The major evolutionary feats shared by Platyhelminthes, Nematoda, and Annelida are having an organ system level of organization, bilateral symmetry, and a triploblastic body structure. These feats indicate the evolution of distinct organ systems and specialized germ layers in these animals. Nematoda additionally exhibits a pseudocoelomate body cavity and a complete digestive system. Annelida displays segmented body structures and the presence of a circulatory system.
1. How does body complexity differ across the 3 phyla (Platyhelmin.pdfarpaqindia
1. How does body complexity differ across the 3 phyla (Platyhelminthes, Nematoda, and
Annelida)? What contributes to this increased complexity? Give 2 examples.
1. How does body complexity differ across the 3 phyla (Platyhelminthes, Nematoda, and
Annelida)? What contributes to this increased complexity? Give 2 examples.
Solution
Answer:
The variable body complexity is differ across the 3 phyla such as platyhelminthes, nematoda, and
annelida because these are multicellular eukaryotes evolved with morphological innovations
including development of locomotors organs and development of various adaptations to survive
in the nature for predation. These are phyla such as platyhelimthes and nematyhelmithes. The
helminthes parasites and species have developed various morphological adaptations for their
survival in the host along with strong scolex to attach to the host internal surfaces. Nematodes
locomotion (round worms, hook worms) and body complexity is variable because the
locomotion of nematodes involves the somatic muscles mainly located under the hypodermis and
these muscle contractions promoted to apply sufficient high hydrostatic pressure laterally to the
cuticle with dorso-ventral bending to move in a sinusoidal manner (C. elegans) as an
evolutionary adaptations.
Annelids have circulatory system, primitive neural systems, and primitive evolutionary features
of invertebrates. Annelid\'s body complexity has increased from lower phyla, platyhelminthes
and nematoda. The body complexity has symmetrical and coelomate & they possess specific
“parapodia” for locomotion. In some species such as earthworms, they have specialized a
hydrostatic skeleton surrounded by several layers of longitudinal and circular muscles to promote
locomotion into the deeper layers of soil.
High metaolic activity, reproductive activity and increased body size have led to this increased
complexity, as part of evolutionary aspects
Platyhelmethis (tape worms): These are mostly parasitic in internal cavities of vertebrate
digestive system with complex asymmetrical body- complexity. The most prominent
segmentation phenomenon has promoted them with sexual reproduction and they use circular
and longitudinal muscle fibers of somatic region located within proglattids; used in locomotion.
For example, Hymenolepis diminuta is also called as rat tapeworm, belongs to cestoda and
possess scolex and proglattids as structural adaptations..
Katari Lebron
Student ID# AC1206834
SC160.3.1 Basic Biology
Assignment 3_03
08/25/14
TITLE: Discuss the properties of life, basic chemical terminology, and molecules and compounds of a cell necessary for life.
Biology is the scientific study of life. It’s a subject that enormous scope and increases all the time. Which leads to many questions like: What is life? Or, let me put it to you this way, what distinguishes living things from non-living? Properties of Life: All living organisms share several key characteristics and/or function. Here you will find seven properties of life: order, response to the environment, reproduction, growth and development, regulation, homeostasis, and energyprocessing. If we analyze these seven characteristics we realize that it serves to define life. I’m going to start off by showing you what each property represents and the important role it plays in life.
(1).Order. Organisms are highly organized, coordinated structures that consist of one or more cells. Even very simple, single-celled organisms are remarkably complex: inside each cell, atoms make up molecules; these in turn make up cell organelles and other cellular inclusions. In multicellular organisms, similar cells form tissues. Tissues, in turn, collaborate to create organs (body structures with a distinct function). Organs work together to form organ systems. (2).
Response to the environment. Organisms can respond to diverse stimuli. For example, plants can grow toward a source of light, climb on fences and walls, or respond to touch. Even tiny bacteria can move toward or away from chemicals (a process called chemo taxis) or light (photo taxis). Movement toward a stimulus is considered a positive response, while movement away from a stimulus is considered a negative response. (3). Reproduction. Single-celled organisms reproduce by first duplicating their DNA. They then divide it equally as the cell prepares to divide to form two new cells. Multicellular organisms often produce specialized reproductive germ line cells that will form new individuals. When reproduction occurs, genes containing DNA are passed along to an organism's offspring. These genes ensure that the offspring will belong to the same species and will have similar characteristics, such as size and shape. (4). Growth and Development. All organisms grow and develop following specific instructions coded for by their genes. These genes provide instructions that will direct cellular growth and development, ensuring that a species' young will grow up to exhibit many of the same characteristics as its parents. (5).Regulation. Even the smallest organisms are complex and require multiple regulatory mechanisms to coordinate internal functions, respond to stimuli, and cope with environmental stresses. Two examples of internal functions regulated in an organism are nutrient transport and blood flow. Organs (groups of tissues working together) perform specific functions, such as carrying oxygen ...
1. How does body complexity differ across the 3 phyla (Platyhelmin.pdfarpaqindia
1. How does body complexity differ across the 3 phyla (Platyhelminthes, Nematoda, and
Annelida)? What contributes to this increased complexity? Give 2 examples.
1. How does body complexity differ across the 3 phyla (Platyhelminthes, Nematoda, and
Annelida)? What contributes to this increased complexity? Give 2 examples.
Solution
Answer:
The variable body complexity is differ across the 3 phyla such as platyhelminthes, nematoda, and
annelida because these are multicellular eukaryotes evolved with morphological innovations
including development of locomotors organs and development of various adaptations to survive
in the nature for predation. These are phyla such as platyhelimthes and nematyhelmithes. The
helminthes parasites and species have developed various morphological adaptations for their
survival in the host along with strong scolex to attach to the host internal surfaces. Nematodes
locomotion (round worms, hook worms) and body complexity is variable because the
locomotion of nematodes involves the somatic muscles mainly located under the hypodermis and
these muscle contractions promoted to apply sufficient high hydrostatic pressure laterally to the
cuticle with dorso-ventral bending to move in a sinusoidal manner (C. elegans) as an
evolutionary adaptations.
Annelids have circulatory system, primitive neural systems, and primitive evolutionary features
of invertebrates. Annelid\'s body complexity has increased from lower phyla, platyhelminthes
and nematoda. The body complexity has symmetrical and coelomate & they possess specific
“parapodia” for locomotion. In some species such as earthworms, they have specialized a
hydrostatic skeleton surrounded by several layers of longitudinal and circular muscles to promote
locomotion into the deeper layers of soil.
High metaolic activity, reproductive activity and increased body size have led to this increased
complexity, as part of evolutionary aspects
Platyhelmethis (tape worms): These are mostly parasitic in internal cavities of vertebrate
digestive system with complex asymmetrical body- complexity. The most prominent
segmentation phenomenon has promoted them with sexual reproduction and they use circular
and longitudinal muscle fibers of somatic region located within proglattids; used in locomotion.
For example, Hymenolepis diminuta is also called as rat tapeworm, belongs to cestoda and
possess scolex and proglattids as structural adaptations..
Katari Lebron
Student ID# AC1206834
SC160.3.1 Basic Biology
Assignment 3_03
08/25/14
TITLE: Discuss the properties of life, basic chemical terminology, and molecules and compounds of a cell necessary for life.
Biology is the scientific study of life. It’s a subject that enormous scope and increases all the time. Which leads to many questions like: What is life? Or, let me put it to you this way, what distinguishes living things from non-living? Properties of Life: All living organisms share several key characteristics and/or function. Here you will find seven properties of life: order, response to the environment, reproduction, growth and development, regulation, homeostasis, and energyprocessing. If we analyze these seven characteristics we realize that it serves to define life. I’m going to start off by showing you what each property represents and the important role it plays in life.
(1).Order. Organisms are highly organized, coordinated structures that consist of one or more cells. Even very simple, single-celled organisms are remarkably complex: inside each cell, atoms make up molecules; these in turn make up cell organelles and other cellular inclusions. In multicellular organisms, similar cells form tissues. Tissues, in turn, collaborate to create organs (body structures with a distinct function). Organs work together to form organ systems. (2).
Response to the environment. Organisms can respond to diverse stimuli. For example, plants can grow toward a source of light, climb on fences and walls, or respond to touch. Even tiny bacteria can move toward or away from chemicals (a process called chemo taxis) or light (photo taxis). Movement toward a stimulus is considered a positive response, while movement away from a stimulus is considered a negative response. (3). Reproduction. Single-celled organisms reproduce by first duplicating their DNA. They then divide it equally as the cell prepares to divide to form two new cells. Multicellular organisms often produce specialized reproductive germ line cells that will form new individuals. When reproduction occurs, genes containing DNA are passed along to an organism's offspring. These genes ensure that the offspring will belong to the same species and will have similar characteristics, such as size and shape. (4). Growth and Development. All organisms grow and develop following specific instructions coded for by their genes. These genes provide instructions that will direct cellular growth and development, ensuring that a species' young will grow up to exhibit many of the same characteristics as its parents. (5).Regulation. Even the smallest organisms are complex and require multiple regulatory mechanisms to coordinate internal functions, respond to stimuli, and cope with environmental stresses. Two examples of internal functions regulated in an organism are nutrient transport and blood flow. Organs (groups of tissues working together) perform specific functions, such as carrying oxygen ...
Joy Nissan 9232014Assignment SCIE207 Phase 5 Lab Report.docxpriestmanmable
Joy Nissan
9/23/2014
Assignment: SCIE207 Phase 5 Lab Report
Title: Taxonomy Lab to Show Organism Relationships
Part 1
Table 1: Samples 1–5
Phylum/Division
Sample 1: Chrysophyta
Sample 2: Annelida
Sample 3: Arthropoda
Sample 4: Amphibia
Sample 5: Aves
Common Feature
Nutrition
How does the organism break down and absorb food?
Autotrophic
Heterotrophic
Heterotrophic
Heterotrophic
Heterotrophic
Circulatory System (Transport)
How does the organism get what it needs to cells (open, closed, diffusion only)?
Diffusion
Closed with 5 aortic arches (hearts)
Open circulatory system with a heart pumping hemolymph
-chambered heart
With chambered heart
Respiratory System
How does the organism get oxygen and release carbon dioxide?
Diffusion
Diffusion through skin
Diffusion through tracheal tubes
Diffusion through gills as a tadpole through lungs and skin (especially) as adults
Diffusion through lungs
Reproductive System
Does the organism use asexual or sexual reproduction (eggs, seeds, spores, placenta, and type of fertilization)?
Asexual
Hermaphrodites: One body has both sexes Sexual: Has special organ called clitellum that moves from the front of the worm to the rear and then falls off, containing the eggs
Sexual: Mostly internal fertilization
Sexual: Mostly external fertilization; must be in water or very moist area
Sexual: Eggs, internal
Excretory System
How does the organism get rid of wastes and maintain an ionic balance of fluids?
Diffusion
Nephridia in each segment; solid waste exits through the anus
Malpighian tubules
Kidneys, intestines, anus
None
Growth and Development
Does the organism go through metamorphosis, develop in an egg or uterus, or grow from seeds?
Starts as small cells; grow bigger until division
Start out as fertilized eggs, hatch into little worms that continue to grow, and then mature sexually into adults
Complete (egg, larvae, pupae, adult) or incomplete (egg, nymph, adult) metamorphosis
Metamorphosis: Egg, tadpole, adult
Develop in egg
Regulation
How does the organism control body processes (hormones, nervous system)?
The nucleus directs protein synthesis. Euglena have eye spots that can detect light
Tiny anterior brain, ganglia, and the nerve cord runs the length of the body
Tiny anterior brain, nerve cord, ganglia, and extremely well-developed sensory organs
Brain, nervous system, good reflexes
Nervous and endocrine systems
Sample organism
Phytoplankton
Earthworm
Fruit Fly
Frog
Bird
Table 2: Samples 6–10
Phylum/Division
Sample 6: Reptilians
Sample 7: Mammalia
Sample 8: Bryophyta
Sample 9:
Gymnosperm
Sample 10: Angiosperm
Common Feature
Nutrition
How does the organism break down and absorb food?
Heterotrophic
Heterotrophic
Autotrophic
Autotrophic
Autotrophic
Circulatory System (Transport)
How does the organism get what it needs to cells (open, closed, diffusion only)?
Closed with 4 chambered heart
Closed with 4 chambered heart
Diffusion through cell walls and cell membranes
Xylem and phloem
Xylem an ...
Which asymmetric cryptosystem is used for digital signaturesA. DE.pdfoptokunal1
Which asymmetric cryptosystem is used for digital signatures?
A. DES
B. SHA1
C. Diffie-Hellman
D. ECC
Solution
D. Elliptic curve cryptosystems (ECC) is an asymmetric cryptosystem created in the 1980s to
create and store digital signatures in a small amount of memory. Answer A is incorrect because
DES is a symmetric algorithm. Answer B is incorrect because SHA1 is a hashing algorithm.
Answer C is incorrect because Diffie-Hellman is used for key exchange..
Which of these theories fit into the contextual world-viewQuestio.pdfoptokunal1
Which of these theories fit into the contextual world-view?
Question 13 options:
Stage theories, like Piaget\'s.
Learning theories, like Skinner\'s.
Universal theories, like Bowlby\'s.
Systems theories, like Bronfenbrenner\'s.
Save
Stage theories, like Piaget\'s.
Learning theories, like Skinner\'s.
Universal theories, like Bowlby\'s.
Systems theories, like Bronfenbrenner\'s.
Solution
ANS: D. Systems theories, like Bronfenbrenner\'s.
Explanation:
Developmental psychology is mainly influenced by three major world views. They are 1.
Organismic, 2. Mechanistic and 3. contextual world views.
Contextual world views:
Development is the result of reciprocal social interactions between an active person and their
social partners from in a series of nested contexts.
Systems theories, like Bronfenbrenner\'s theory fit into the contextual world-view.
Wrong theories:
A. Stage theories, like Piaget\'s. (Organismic)
B. Learning theories, like Skinner\'s. (Mechanistic)
C. Universal theories, like Bowlby\'s. (Maturational).
More Related Content
Similar to What are the major evolutionary feats shared by all 3 phyla( Platyhe.pdf
Joy Nissan 9232014Assignment SCIE207 Phase 5 Lab Report.docxpriestmanmable
Joy Nissan
9/23/2014
Assignment: SCIE207 Phase 5 Lab Report
Title: Taxonomy Lab to Show Organism Relationships
Part 1
Table 1: Samples 1–5
Phylum/Division
Sample 1: Chrysophyta
Sample 2: Annelida
Sample 3: Arthropoda
Sample 4: Amphibia
Sample 5: Aves
Common Feature
Nutrition
How does the organism break down and absorb food?
Autotrophic
Heterotrophic
Heterotrophic
Heterotrophic
Heterotrophic
Circulatory System (Transport)
How does the organism get what it needs to cells (open, closed, diffusion only)?
Diffusion
Closed with 5 aortic arches (hearts)
Open circulatory system with a heart pumping hemolymph
-chambered heart
With chambered heart
Respiratory System
How does the organism get oxygen and release carbon dioxide?
Diffusion
Diffusion through skin
Diffusion through tracheal tubes
Diffusion through gills as a tadpole through lungs and skin (especially) as adults
Diffusion through lungs
Reproductive System
Does the organism use asexual or sexual reproduction (eggs, seeds, spores, placenta, and type of fertilization)?
Asexual
Hermaphrodites: One body has both sexes Sexual: Has special organ called clitellum that moves from the front of the worm to the rear and then falls off, containing the eggs
Sexual: Mostly internal fertilization
Sexual: Mostly external fertilization; must be in water or very moist area
Sexual: Eggs, internal
Excretory System
How does the organism get rid of wastes and maintain an ionic balance of fluids?
Diffusion
Nephridia in each segment; solid waste exits through the anus
Malpighian tubules
Kidneys, intestines, anus
None
Growth and Development
Does the organism go through metamorphosis, develop in an egg or uterus, or grow from seeds?
Starts as small cells; grow bigger until division
Start out as fertilized eggs, hatch into little worms that continue to grow, and then mature sexually into adults
Complete (egg, larvae, pupae, adult) or incomplete (egg, nymph, adult) metamorphosis
Metamorphosis: Egg, tadpole, adult
Develop in egg
Regulation
How does the organism control body processes (hormones, nervous system)?
The nucleus directs protein synthesis. Euglena have eye spots that can detect light
Tiny anterior brain, ganglia, and the nerve cord runs the length of the body
Tiny anterior brain, nerve cord, ganglia, and extremely well-developed sensory organs
Brain, nervous system, good reflexes
Nervous and endocrine systems
Sample organism
Phytoplankton
Earthworm
Fruit Fly
Frog
Bird
Table 2: Samples 6–10
Phylum/Division
Sample 6: Reptilians
Sample 7: Mammalia
Sample 8: Bryophyta
Sample 9:
Gymnosperm
Sample 10: Angiosperm
Common Feature
Nutrition
How does the organism break down and absorb food?
Heterotrophic
Heterotrophic
Autotrophic
Autotrophic
Autotrophic
Circulatory System (Transport)
How does the organism get what it needs to cells (open, closed, diffusion only)?
Closed with 4 chambered heart
Closed with 4 chambered heart
Diffusion through cell walls and cell membranes
Xylem and phloem
Xylem an ...
Which asymmetric cryptosystem is used for digital signaturesA. DE.pdfoptokunal1
Which asymmetric cryptosystem is used for digital signatures?
A. DES
B. SHA1
C. Diffie-Hellman
D. ECC
Solution
D. Elliptic curve cryptosystems (ECC) is an asymmetric cryptosystem created in the 1980s to
create and store digital signatures in a small amount of memory. Answer A is incorrect because
DES is a symmetric algorithm. Answer B is incorrect because SHA1 is a hashing algorithm.
Answer C is incorrect because Diffie-Hellman is used for key exchange..
Which of these theories fit into the contextual world-viewQuestio.pdfoptokunal1
Which of these theories fit into the contextual world-view?
Question 13 options:
Stage theories, like Piaget\'s.
Learning theories, like Skinner\'s.
Universal theories, like Bowlby\'s.
Systems theories, like Bronfenbrenner\'s.
Save
Stage theories, like Piaget\'s.
Learning theories, like Skinner\'s.
Universal theories, like Bowlby\'s.
Systems theories, like Bronfenbrenner\'s.
Solution
ANS: D. Systems theories, like Bronfenbrenner\'s.
Explanation:
Developmental psychology is mainly influenced by three major world views. They are 1.
Organismic, 2. Mechanistic and 3. contextual world views.
Contextual world views:
Development is the result of reciprocal social interactions between an active person and their
social partners from in a series of nested contexts.
Systems theories, like Bronfenbrenner\'s theory fit into the contextual world-view.
Wrong theories:
A. Stage theories, like Piaget\'s. (Organismic)
B. Learning theories, like Skinner\'s. (Mechanistic)
C. Universal theories, like Bowlby\'s. (Maturational).
Which of the following distinguishes prophase of meiosis I from proph.pdfoptokunal1
Which of the following distinguishes prophase of meiosis I from prophase of mitosis?
homologous chromosomes pair up spindle forms nuclear membrane breaks down
chromosomes become visible
Solution
In meiosis there are two successive divion occure, meiosis I(which is reduction division) and
meiosis II (similar division). While meiosis II is similar to mitosis,Meiosis I is a eventfull cell
divion, divided into 4 phases....Prophase1, metaphase 1,Anaphase 1 and telophase 1.
Prophase 1 of MEIOSIS 1 divided into following subphases- LEPTONEMA, ZYGONEMA,
PACHYNEMA, DIPLOTENE and DIAKINESIS.
In zygotene or Zygonema homologous chromosome(paternally derrived and maternally derrived)
pair and form synapse in the process of synapsis..
What is meant by primary growth What is meant by secondary growth .pdfoptokunal1
What is meant by primary growth? What is meant by secondary growth? What are the three
primary meristems? What tissue(s develop(s) from each? How does the distribution of the
vascular bundles differ in monocots and dicots? Monocots: Dicots: What type of tissue
comprises the bundle cap of Hellanthus? What are some differences between the xylem and the
phloem?
Solution
1. Primary growth refers to the growth that occurs due to cell divisions at the tips of roots and
shoots , which cause them to elongate and forms primary tissue.
Secondary growth refers to the one that occurs due to cell division in cambium or lateral
meristem of the plant, that allows the plant to thicken..
What to the characteristic X-ray radiation What is the originSo.pdfoptokunal1
What to the characteristic X-ray radiation? What is the origin?
Solution
- Characteristics x- ray radiations are emitted from heavy elements when their electrons make
transitions between the lower atomic energy levels.
- the high energy electron can also cause an electron close to the neclues in a metal atom to be
knocked out from its place
ORIGIN
Discovery. German physicist Wilhelm Röntgen is usually credited as the discoverer of x rays in
1895, because he was the first to systematically study them, though he is not the first to have
observed their effects.
Rountgen called them x rays after the mathematical symbol X for unknown.
What other blood cell related problems are often seen in patients wi.pdfoptokunal1
What other blood cell related problems are often seen in patients with chronic leukemia?
Citereferencesplease
Solution
The term leukemia is referred to neoplasm of hematopoietic tissue. Unlike the solid tumors the
leukemic cells diffuse into bone marrow and lymphoid tissues and spill over into blood stream to
spread to various organs of the body. The leukemic cells are either mature or extremely
primitive. Rich amounts of white blood cell counts in leukemia reveals the spread of tumors to
peripheral blood. However, the proliferation of white blood cells is mostly confined to bone
marrow and no significant increase in number of white blood cells in the blood stream can be
observed.
Leukemia is classified depending on the type of the cell and maturity of proliferating cell. Any
type of hematopoietic cell may produce leukemia but most common types are granulocytic,
monocytic and lymphocytic. The leukemia developing from stem cells produce the leukocytes
containing specific granules such as neutrophils, eosinophils and basophils. This type of
leukemia is called granulocytic leukemia. Monocytic leukemia is developed from the precursor
cells of monocytes. Lymphocytic leukemia is produced by lymphoid precursor cells.
When the leukemic cells are most primitive forms the neoplasm is called acute leukemia. The
leukemia with mature cells is called chronic leukemia. Chronic granulocyte leukemia is caused
by circulating matured granulocytes and neutrophils along with few primitive cells. Chronic
lymphocytic leukemia is caused by circulating mature lymphocytes.
The clinical features of leukemia are either caused by impairment of function of bone marrow or
caused by infiltration of leukemic cells into viscera. The overgrowth of leukemic cells in bone
marrow crowds out the normal cells leading to anemia because of inadequate production of red
blood cells. Bleeding is caused by thrombocytopenia and infection resulting from insufficient
numbers of white blood cells to provide protection by immune defense mechanism against
pathogens.
Leukemic cells spreading to other tissues may invade into spleen, liver, lymph nodes and other
tissues. The chronic leukemia proceeds at a slow rate and can be controlled by treatment over
long periods of time. Therefore, the patient may survive for several years. In an acute leukemia
the disease is rapidly progressive and leukemic cells infiltrate bone marrow and viscera with
conspicuous appearance.
1.American Cancer Society. Cancer Facts and Figures 2016. Atlanta, Ga: American Cancer
Society; 2016.
2. Byrd JC, Brown JR, O\'Brien S, et al. Ibrutinib versus ofatumumab in previously treated
chronic lymphoid leukemia. N Engl J Med. 2014 Jul 17;371(3):213-23. Epub 2014 May 31.
3. Byrd JC, Furman RR, Coutre SE, et al. Targeting BTK with ibrutinib in relapsed chronic
lymphocytic leukemia. N Engl J Med. 2013 Jul 4;369(1):32-42. Epub 2013 Jun 19.
4. Byrd JC, Flynn JM. Chronic lymphocytic leukemia. In: Niederhuber JE,Armitage JO,
Doroshow .
what is inductive and deductive reasoningSolutionDeductive and.pdfoptokunal1
what is inductive and deductive reasoning
Solution
Deductive and Inductive Reasoning
Deductive and inductive are basically types of arguments and where argument generally supports
conclusion with premises.
Deductive reasoning is basically a type of argument which supports conclusion logically for
example arguments which are based on rules, facts, truth, laws and principles and are accepted
widely.
It is the process of reasoning which involves to draw conclusion based on the relationship of two
premises in which one assertion is broad(major premises and valid) and other is specific(minor
premises and invalid). As major premises are broad it is to be supported by values and laws.
Like for instance:
Reena is a woman
All women are mortal
Therefore it proves that reena is mortal.
It is a top to down approach.
Inductive Reasoning is basically a type of argument which supports conclusion on the basis of
judgment, pattern, trend, experience and observation. These arguments do not prove truth as
these conclusions are based on probable support. The argument which support successfully is a
strong argument whereas that fails to support is considered as weak. It is a bottom to up
approach..
What are some of the advantages in the use of AOA notation as oppose.pdfoptokunal1
What are some of the advantages in the use of AOA notation as opposed to AON? Under what
circumstances does it seem better to apply AON methodology in network development?
Solution
AOA means activity on arc. In network diagrams AOA notation uses arrow diagram where each
activity is represented by an arrow joining 2 circles (nodes). The circles or the nodes represents
the transition between activities, which are called events.
AON means activity on node. Here activities are represented by circles and the arc represents the
events.
The advantage of using AOA as opposed to AON is that AOA is more suitable for analytical
techniques. Path tracking in case of AOA is simplified by event numbering. Lastly key events
are easy to identify.
AON is better under the following circumstances:.
Use C++class Node{public Node ( int = 0 ); constru.pdfoptokunal1
Use C++
class Node{
public:
Node ( int = 0 ); // constructor with default value for
// info field
int info; // data
Node * next; // pointer to next node in the list
};
and put the constructor in Node.cpp
// Constructor
Node::Node ( int data )
{
info = data;
next = nullptr;
}
Write the following using the Node class.
A function that copies a linked list pointed to by ptr and returns a pointer to the copied list.
Please note: the copied list should be independent of the original list; the original list can be
destroyed and the copy should still remain.
const Node * copy (Node * ptr);
Solution
Need to perform \'Deep copy\' here :
const Node * copy (Node * ptr)
{
//Create new list to hold copied items
Node* newNode = new Node;
//Return if empty list
if (ptr->next == 0)
{
return newNode;
}
while(ptr !=NULL)
{
newNode->info = ptr->info;
newNode->next = ptr->next;
ptr = ptr ->next;
}
return newNode;
}.
This is a lab for a java program that I am very unsure of, it has to.pdfoptokunal1
This is a lab for a java program that I am very unsure of, it has to do with Binary trees, and I am
very confused on how to work with them, if anyone can help I will be very grateful, thank you!!
You are to create a balanced binary tree which means that at each node n, the size of the left
subtree of n is within one of the size of the right subtree of n
Your program shall read in from user input a list of positive integers into an array (at most 100
elements). Your input stops when it reads a 0 (sentinel ).
Your program will then sort the elements in the array. You MUST write your own sort routine
You are then to create a balanced binary tree from this data.
You are then to print out your balanced tree using pre-order, in-order, and post-order routines
Requirements
1) Program must read integers from user input into an array
2) Program must sort integers with sort routine written by user
3) Program must implement a binary tree object using links (not arrays)
4) Program must implement at least methods PREORDER, INORDER, POSTORDER, ADD
(create a balanced binary search tree from the given array).
5) Output demonstrating input and output
Solution
import java.io.*;
import java.util.*;
class Nodetype
{
int info;
int ht;
Nodetype left;
Nodetype right;
Nodetype(int i)
{
info=i;
ht=0;
left=null;
right=null;
}
}
class Functions
{
Nodetype AVLroot;
void create()
{
int x,n,i;
AVLroot=null;
int[] a=new int[100];
String str;
int counter=0;
System.out.println(\"\ Enter numbers:\");
do
{
x=getNumber();
a[counter]=x;
counter++;
}while(x!=0);
int[] finalarr=new int[100];
finalarr=sort(a);
int tcntr=0;
while(finalarr[tcntr]!=0)
{
AVLroot=insert(AVLroot,finalarr[tcntr]);
tcntr++;
}
System.out.println(\"\ Preorder sequene:\");
preorder(AVLroot);
System.out.println(\"\ Inorder sequence:\");
inorder(AVLroot);
System.out.println(\"\ Postorder sequence:\");
postorder(AVLroot);
}
int[] sort(int[] arr)
{
int n = arr.length;
int temp = 0;
for(int i=0; i < n; i++){
for(int j=1; j < (n-i); j++){
if(arr[j-1] > arr[j]&&arr[j]!=0){
//swap elements
temp = arr[j-1];
arr[j-1] = arr[j];
arr[j] = temp;
}
}
}
return (arr);
}
int getNumber()
{
String str;
int ne=0;
InputStreamReader input=new InputStreamReader(System.in);
BufferedReader in=new BufferedReader(input);
try
{
str=in.readLine();
ne=Integer.parseInt(str);
}
catch(Exception e)
{
System.out.println(\"\ I/O error.\");
}
return ne;
}
Nodetype insert(Nodetype T,int x)
{
if(T==null)
{
Nodetype node=new Nodetype(x);
T=node;
}
else
if(x>T.info)
{
T.right=insert(T.right,x);
if(BF(T)==-2)
if(x>T.right.info)
T=RR(T);
else
T=RL(T);
}
else
if(xrh)
return(lh);
return(rh);
}
Nodetype rotateright(Nodetype x)
{
Nodetype y;
y=x.left;
x.left=y.right;
y.right=x;
x.ht=height(x);
y.ht=height(y);
return(y);
}
Nodetype rotateleft(Nodetype x)
{
Nodetype y;
y=x.right;
x.right=y.left;
y.left=x;
x.ht=height(x);
y.ht=height(y);
return(y);
}
Nodetype RR(Nodetype T)
{
T=rotateleft(T);
return(T);
}
Nodetype LL(Nodetype T)
{
T=rotateright(T);
return(T);
.
The concentration of carbon dioxide in the atmosphere today is about .pdfoptokunal1
The concentration of carbon dioxide in the atmosphere today is about Select one: a. 170 parts
per million. b. 300 parts per million. c. 400 parts per million d. 800 parts per million. How
would a shift in land use from forest to agriculture affect atmospheric carbon dioxide? Select
one: a. It would have no effect. b. It would result in a large release of CO_2 c. It would result
in a decrease in release of CO_2 d. Neither forests nor crops contribute significantly to
atmospheric carbon dioxide Charles Keeling chose to monitor atmospheric carbon dioxide levels
at Mauna Loa Observatory because Select one: a. uptake of carbon dioxide would be greatest in
warm tropical forests b. it was located far from industrial sources of pollution that might make
interpretation of the data more difficult c. the climate in Hawaii was very different from the
climate of Big Sur (California) where he did his previous work on carbon dioxide d. the relative
contribution of fossil fue
Solution
The concentration of carbondioxide in the atmosphere today is around 400 Parts per million
(ppm). The safe level of carbondioxide in atmosphere is around 350ppm. The shift in land use
from forest to agrivulture results in large release of carbondioxide in atmosphere. Also release of
other greenhouse gasses results in global warming. Its because of the relative contribution of
fossil fuel burning to the release of atmospheric carbondioxide was debated. Its one of the major
reason for the increase in global warminh..
Research and discuss two operating systems and how incident response.pdfoptokunal1
Research and discuss two operating systems and how incident response processes may differ in
properly shutting down the systems for transport to the laboratory.
Solution
Computer Incident Response and Computer Forensics Overview carried out in different
operating system. As follows below:
Introduction
When a compromise of security or an unauthorized/illegal action associated with a
computer is suspected, it is important that steps are taken to ensure the protection of the
data within the computer and/or storage media. The stored data is needed to determine
the level of security compromise and location of potential evidence concerning the
unauthorized or illegal act.
The initial response to a computer security incident may be more important than later
technical analysis of the computer system because of the actions taken by incident
response team members. Actions taken by the incident response team impact subsequent
laboratory examinations of the computer and/or media. Of most importance is that the
first responder act appropriately.
In the event of a suspected computer incident, care must be taken to preserve evidence in
its original state. While it may seem that simply viewing files on a system would not
result in alteration of the original media, opening a file changes it. From a legal sense, it
is no longer the original evidence and may be inadmissible in any subsequent legal or
administrative proceedings.
This paper will focus on the incident response and computer forensics on the personal or
desktop computers. The incident response and forensic procedures and techniques for
servers may additional knowledge and tools.
Incident Response
Every organization should have an incident response team. This team may consist of one
person in an organization or several persons. In the event of suspected computer crime or
violations of user policies, the team should be activated. The team should have written
procedures for incident response, including what conditions warrant calling in local
and/or federal law enforcement authorities. Violations of user policies may result in
administrative actions whereas suspected computer crimes may require that law
enforcement authorities be called in. The incident team needs to protect evidence for
either situation. For administrative actions, the procedures described in this paper may be
sufficient. However, for suspected computer crimes, the law enforcement officials may
instruct the incident team to wait for their arrival.
The activities/procedures for securing a suspected computer incident scene include
· Securing the scene
· Shutting down the computer
· Labeling the evidence
· Documenting the evidence
· Transporting the evidence
· Providing chain-of-custody documentation
The computer incident response team should keep in mind that what begins as a
collection of evidence for violation of administrative policy violations may escalate into
collection of evidence for more serious violations. The computer may hav.
Proteins can be attached to a membrane in a variety of ways. How doe.pdfoptokunal1
Proteins can be attached to a membrane in a variety of ways. How does the mode of attachment
relate to their function?
Solution
Membrane proteins are very important for different type of cellular functions like a transport
signalling pathways and cell adhesion etc…. proteins are interacting with membrane in different
types
Some proteins are associated with cytoplasmic face of the cell membrane; some proteins are
associated with extracellular face of the plasma membrane (peripheral proteins) and integral or
intrinsic proteins. Extrinsic proteins do not interact with the hydrophobic core of the
phospholipids bilayer.
Example porins are transmembrane proteins that play a major role in water transport
Prostaglandin H2 extracellular membrane bounded protein that is associated with surface of the
plasma membrane. Play major role in inflammation..
Problem 1-What is environmental engineering (20 pts) Below you wil.pdfoptokunal1
Problem 1-What is environmental engineering? (20 pts) Below you will see a list of four
different scenarios which to field of environmental engineering. For each one of ihena may
involve the area you need (1) Write out if th have defined it in our course e scenario involves
environmental engineering as wo for (1) by explaining what area of environmental engineering
the scenario fits into and why decide YES, the scenario does involve the field of specific an
environmental engineering, then describe something environmental engineer might do as part o
scenario. If you decide scendor of environmental engineering. you do not have to do anything t f
their job in thot e NQ, the scenario does not involve the field this step. northern Scenario 1:
Unsustainable deforestation in an old growth Canadian forest the Congo. Scenario 3: Assessment
of the level of exposure of indoor air pollutants in a school building for children that go to the
school. Scenario 4: Assisting a Native American tribe in legal arguments to justity to a state
court that their water rights are being violated. Scenario 2: Right handling of acid mine water
drainage for a gold mine in
Solution
1.
1.At 0.02% of its forested area, deforestation in Canada is among the world’s lowest, yet many
myths exist about the state of our forests. The reality is that Canada is a world leader in
sustainable forest management. Canadian forests are healthy, productive and thriving.
Deforestation is an important issue, since shrinking forest cover reduces biodiversity, affects soil
and water quality, impacts wildlife habitat and influences climate change. The Canadian
government carefully monitors and regularly publishes reports on deforestation. Our scientists
combine satellite and aerial images with information about regional development, forest
ecosystems, natural processes and local conditions to help monitor and manage the health of
Canadian forests.
Here are some key facts about Canada’s low levels of deforestation.
The annual deforestation rate in Canada in 2010 was less than 0.02% of our forests and the rate
has been declining for over 25 years. In 1990, 63,100 hectares were lost to deforestation and in
2014 this figure dropped to 34,200 hectares.
Today, Canada’s 348 million hectares of forest lands represent about 9% of the world’s forest
cover, but account for only 0.3% of global deforestation.
Deforestation only occurs when forests are permanently removed so the land can be used for
something else. Harvesting, forest fires and insect infestations do not constitute deforestation,
since the affected areas will grow back. According to laws, regulations and policies in place
across Canada, all areas harvested on public land must be reforested, either by replanting or
through natural regeneration. About 94% of Canada’s forests are on public land.
The conversion of forest to agricultural land is decreasing but it remains the largest contributor to
deforestation in Canada. The small contribution the.
NetWork Design Question2.) How does TCP prevent Congestion Dicuss.pdfoptokunal1
NetWork Design Question
2.) How does TCP prevent Congestion? Dicuss the information identifying congestion in the
network as well as the mechanism for reducing congestion?
Solution
Congestion is a problem that occurs on shared networks when multiple users contend for access
to the same resources (bandwidth, buffers, and queues).
Transmission Control Protocol (TCP) uses a network congestion-avoidance algorithm that
includes various aspects of an additive increase/multiplicative decrease (AIMD) scheme, with
other schemes such as slow-start to achieve congestion avoidance.
The TCP congestion-avoidance algorithm is the primary basis for congestion control in the
Internet.
Congestion typically occurs where multiple links feed into a single link, such as where internal
LANs are connected to WAN links. Congestion also occurs at routers in core networks where
nodes are subjected to more traffic than they are designed to handle.
TCP/IP networks such as the Internet are especially susceptible to congestion because of their
basic connection- less nature. There are no virtual circuits with guaranteed bandwidth. Packets
are injected by any host at any time, and those packets are variable in size, which make
predicting traffic patterns and providing guaranteed service impossible. While connectionless
networks have advantages, quality of service is not one of them.
Shared LANs such as Ethernet have their own congestion control mechanisms in the form of
access controls that prevent multiple nodes from transmitting at the same time.
Identifying:
Congestion is primarily reflected by a conventional user feeling-- slowness. This statement
reflects the change in the network effective flow, that is the time required to transmit an entire
data from one point to another. The effective flow doenot exist as such, it consists in reality of
three seperate indicators:
*Latency:the effective flow is inversely proportional to the latency.
*Jitter:it is latency variation over time, impacts by influencing the flow latency
*Loss Rate:the theoritical bandwidth is inversely proportional to the square root of the loss rate
These Congestion symtoms allow us to rely on objective indicators to characterize it.
Mechanism to reduce congestion:
The standard fare in TCP implementations today has four standard congestion control algorithms
that are now in common use. Their usefulness has passed the test of time.
The four algorithms, Slow Start, Congestion Avoidance, Fast Retransmit and Fast Recovery are
described below. (a) Slow Start
Slow Start, a requirement for TCP software implementations is a mechanism used by the sender
to control the transmission rate, otherwise known as sender-based flow control. This is
accomplished through the return rate of acknowledgements from the receiver. In other words, the
rate of acknowledgements returned by the receiver determine the rate at which the sender can
transmit data. When a TCP connection first begins, the Slow Start algorithm initializes a
.
Mosses and liverworts are early colonizers during ecological success.pdfoptokunal1
Mosses and liverworts are early colonizers during ecological succession and make the
environment more amenable for other species. How do these plants contribute to nitrogen levels
in the soil?
Solution
Answer:
Mosses and liverworts have been found to be the first organisms to colonize either a primary
succession or secondary succession. Their spores are carried by birds, insects or wind.
Studies indicate that mosses and liverworts make the soil more amenable to colonization by other
plants. This can be attributed to the fact that mosses and liverworts establish symbiotic
association with nitrogen fixing cyanobacteria, thus replenishing the soil with nitrogen..
Many programming languages, especially older ones, provide no langua.pdfoptokunal1
Many programming languages, especially older ones, provide no language support for
concurrency. C and C++ are examples of such languages. Is it essential that a language include
syntax for concurrency to be able to write concurrent programs in that language? If not, how is it
accomplished? What are the advantages and disadvantages of including support for concurrency
in a language?
Solution
Advantages:
1).Although the tasks are running and the user can relate with the applications.
2).It has the availability of services. means long running the tasks will not delay tiny running
ones.
3). complex programs make better use of many resources.
4).tasks are requiring certain pre conditions can hang and wait untill the pre conditions are seize
and then restart implementation properly.
Disadvantages:
1). a chance of corrupting consistent state of program by concurrent tasks.
2).Deadlock may occur.
3).It would be masters exponential number of interleavings due to different schedules..
Inferior nasal concha Lacrimal bone Mandible Maxilla Nasal bone .pdfoptokunal1
Inferior nasal concha Lacrimal bone Mandible Maxilla Nasal bone Palatine bone Vomer
bone Zygomatic bone Forms bridge of nose Only movable bone in the facial skeleton Contains
coronoid process Creates prominence of cheek inferior and lateral to the eye Contains sockets
of upper teeth Forms inferior portion of nasal septum Forms anterior portion of zygomatic arch
Scroll-shaped bone in nasal passage Forms anterior roof of mouth Contains mental foramen
Forms posterior roof of mouth Small bone in medial wall of orbit Forms a very small portion of
inferior orbit Contains large sinus inferior to orbit
Solution.
import java.util.;public class Program{public static void.pdfoptokunal1
import java.util.*;
public class Program
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String x=\"X\";
int amount;
System.out.println(\"Enter amount\");
amount=input.nextInt();
System.out.println(\"Amount is: \"+amount);
for(int i=1; i<=amount; i++)
{
System.out.println(x);
for(int j=1; j<=i; j++)
{
System.out.print(x);
}
}
}
}
Why does It print out the last set of X\'s twice? I am doing basic Java so please try to explain
using the most basic codes.
import java.util.*;
public class Program
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String x=\"X\";
int amount;
System.out.println(\"Enter amount\");
amount=input.nextInt();
System.out.println(\"Amount is: \"+amount);
for(int i=1; i<=amount; i++)
{
System.out.println(x);
for(int j=1; j<=i; j++)
{
System.out.print(x);
}
}
}
}
Why does It print out the last set of X\'s twice? I am doing basic Java so please try to explain
using the most basic codes.
import java.util.*;
public class Program
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String x=\"X\";
int amount;
System.out.println(\"Enter amount\");
amount=input.nextInt();
System.out.println(\"Amount is: \"+amount);
for(int i=1; i<=amount; i++)
{
System.out.println(x);
for(int j=1; j<=i; j++)
{
System.out.print(x);
}
}
}
}
Why does It print out the last set of X\'s twice? I am doing basic Java so please try to explain
using the most basic codes.
Solution
Hi,
I have modified the code. it is working as expected now. Highlighted the code changes below.
Issue here is with you have written this statement twice System.out.println(x); which causes the
issue.
Program.java
import java.util.*;
public class Program
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String x=\"X\";
int amount;
System.out.println(\"Enter amount\");
amount=input.nextInt();
System.out.println(\"Amount is: \"+amount);
for(int i=1; i<=amount; i++)
{
System.out.println();
for(int j=1; j<=i; j++)
{
System.out.print(x);
}
}
}
}
Output:
Enter amount
10
Amount is: 10
X
XX
XXX
XXXX
XXXXX
XXXXXX
XXXXXXX
XXXXXXXX
XXXXXXXXX
XXXXXXXXXX.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
What are the major evolutionary feats shared by all 3 phyla( Platyhe.pdf
1. What are the major evolutionary feats shared by all 3 phyla( Platyhelminthes, Nematoda, and
Annelida)? What are the implications of these evolutionary feats? What two additional
evolutionary feats are exhibited by Nemotoda? And 2 feats by Annelida?
Solution
Answer:
The major evolutionary feats shared by Platyhelminthes, Nematoda and Annelida are:
1. Level of Organization- Organ system level of organization
The organisms possesses distinct organ systems which marks the evolution of organ systems in
animals.
2. Symmetry - Bilateral
This is often a result of moving in one direction, thus having a “head” end.
3. Triploblastic
They share common body wall organization, consisting of 3 layers. Three germ layers are
evidence of slowly adapting layers of developmental control during embryogenesis as cells
specialized for greater efficiency.
Two additional evolutionary feats exhibited by Nematoda are:
1. Coelom- Pseudocoelomate
2. Digestive system -Complete
Two feats of Annelida are:
1. Segmentation - Presented
2. Circulatory system -Present