Guided notes covering material from Topics 4.1 and 4.2 of the updated IB Biology syllabus for 2016 exams. Notes sequence and prompts are based on the Oxford IB Biology textbook by Allott and Mindorff.
Edexcell Biology;
Most year 10 & 11 syllabus points by ppt.
Used in lessons to scaffold class teaching and as a revision resource for students
These resources are from many sources
Unit 3: Microbiology of Early Earth
LECTURE LEARNING GOALS
• Describe the early Earth environment, and prevailing theories for the origins of life.
• Describe the major events in the evolution of cellular life, and when they happened.
• Explain the lines of evidence that lead us to know when early life arose, and the scientific basis behind each line.
Unit 6: Diversity of Microbial Mats
LECTURE LEARNING GOALS
1. Definemicrobialmats.Describethe functional guilds of microbes in the different layers, and how they interact.
2. Foreachofthethreephylaof photosynthetic bacteria, contrast how each fixes C and gains energy and reducing equivalents from light.
3. Forthetwothermophilicbacterialphyla, describe their adaptations to life at high
temperature. Explain how they are primitive and deeply-branching.
Origin and Evolution of Life by Ratnodip SahaRatnodip Saha
Here I've discussed, how life originated on earth and how it evolved to today's form.
Contents:
What is life? What is life cycle?
Abiogenesis or Origin of life: chemogeny & biogeny
Steps of Abiogenesis
What is Hot dilute soup theory?
Protocells: coacervates & microspheres
What is evolution?
What is variation?
Differences between variation and Mutation
Unit 5: Everything is everywhere?
LECTURE LEARNING GOALS
1. State the Baas Becking hypothesis, and describe the environmental traits are the strongest drivers of microbial community.
2. Explain how to measure community dissimilarity. Explain why the Baas Becking hypothesis continues to be tested today.
3. Describe methods to link taxonomic or community structure to function.
Biology Essay
Wildlife Conservation and Biology Essay
Structure And Function Of Biology Essay
Synthetic Biology? Essay
Biology Lab Essay
Biology Reflection
Biology Major Essay
Why I Chose Biology
Evolutionary Biology Essay
Why I Chose To Study Biology
Biology Is The Science Of Life
Biology Admission Essay
Examples Of My Favourite Subject In Biology
Relationships and Interactions in Biology Essay
Biology Application Essay Sample
Biology Compare And Contrast Essay
Biology : A Career In The Career Of Biology
Biology And Modern Biology
Lactase Experiment
Biology Major Essay
Guided notes covering material from Topics 4.1 and 4.2 of the updated IB Biology syllabus for 2016 exams. Notes sequence and prompts are based on the Oxford IB Biology textbook by Allott and Mindorff.
Edexcell Biology;
Most year 10 & 11 syllabus points by ppt.
Used in lessons to scaffold class teaching and as a revision resource for students
These resources are from many sources
Unit 3: Microbiology of Early Earth
LECTURE LEARNING GOALS
• Describe the early Earth environment, and prevailing theories for the origins of life.
• Describe the major events in the evolution of cellular life, and when they happened.
• Explain the lines of evidence that lead us to know when early life arose, and the scientific basis behind each line.
Unit 6: Diversity of Microbial Mats
LECTURE LEARNING GOALS
1. Definemicrobialmats.Describethe functional guilds of microbes in the different layers, and how they interact.
2. Foreachofthethreephylaof photosynthetic bacteria, contrast how each fixes C and gains energy and reducing equivalents from light.
3. Forthetwothermophilicbacterialphyla, describe their adaptations to life at high
temperature. Explain how they are primitive and deeply-branching.
Origin and Evolution of Life by Ratnodip SahaRatnodip Saha
Here I've discussed, how life originated on earth and how it evolved to today's form.
Contents:
What is life? What is life cycle?
Abiogenesis or Origin of life: chemogeny & biogeny
Steps of Abiogenesis
What is Hot dilute soup theory?
Protocells: coacervates & microspheres
What is evolution?
What is variation?
Differences between variation and Mutation
Unit 5: Everything is everywhere?
LECTURE LEARNING GOALS
1. State the Baas Becking hypothesis, and describe the environmental traits are the strongest drivers of microbial community.
2. Explain how to measure community dissimilarity. Explain why the Baas Becking hypothesis continues to be tested today.
3. Describe methods to link taxonomic or community structure to function.
Biology Essay
Wildlife Conservation and Biology Essay
Structure And Function Of Biology Essay
Synthetic Biology? Essay
Biology Lab Essay
Biology Reflection
Biology Major Essay
Why I Chose Biology
Evolutionary Biology Essay
Why I Chose To Study Biology
Biology Is The Science Of Life
Biology Admission Essay
Examples Of My Favourite Subject In Biology
Relationships and Interactions in Biology Essay
Biology Application Essay Sample
Biology Compare And Contrast Essay
Biology : A Career In The Career Of Biology
Biology And Modern Biology
Lactase Experiment
Biology Major Essay
This is the introductory lesson of the course; 'Foundation of Environmental Management' taught at the Faculty of Social Sciences and Humanities of the Rajarata University of Sri Lanka
Environmental Science Table of Contents 37 L.docxYASHU40
Environmental Science Table of Contents
37
Lab 3
Biodiversity
Biodiversity
Concepts to Explore
• Biodiversity
• Species diversity
• Ecosystem diversity
• Genetic diversity
• Natural selection
• Extinction
Introduction
Biodiversity, short for biological diversity, includes the genetic variation between all organisms, species, and
populations, and all of their complex communities and ecosystems. It also reflects to the interrelatedness of
genes, species, and ecosystems and their interactions with the environment. Biodiversity is not evenly distrib-
uted across the globe; rather, it varies greatly and even varies within regions. It is partially ruled by climate,
whereas tropical regions can support more species than a polar climate. In whole, biodiversity represents
variation within three levels:
• Species diversity
• Ecosystem diversity
• Genetic diversity
It should be noted that diversity at one of these levels may
not correspond with diversity within other levels. The degree
of biodiversity, and thus the health of an ecosystem, is im-
pacted when any part of that ecosystem becomes endan-
gered or extinct.
The term species refers to a group of similar organisms that
reproduce among themselves. Species diversity refers to
the variation within and between populations of species, as
well as between different species. Sexual reproduction criti-
cally contributes to the variation within species. For exam-
ple, a pea plant that is cross-fertilized with another pea plant
can produce offspring with four different looks! This genetic
mixing creates the diversity seen today.
Figure 1: There are more than 32,000 species of
fish – more than any other vertebrate!
39
Biodiversity
Ecosystem diversity examines the different habitats, biological communities, and ecological processes in
the biosphere, as well as variation within an individual ecosystem. The differences in rainforests and deserts
represent the variation between ecosystems. The physical characteristics that determine ecosystem diversity
are complex, and include biotic and abiotic factors.
? Did You Know...
A present day example of natural
selection can be seen in the cray-
fish population. The British crayfish
are crustaceans that live in rivers in
England. The American crayfish
was introduced to the same bodies
of water that were already populat-
ed by the British crayfish. The
American crayfish are larger, more
aggressive and carry an infection
that kills British crayfish but to
which they are immune. As a re-
sult, the British crayfish are de-
creasing in number and are ex-
pected to become extinct in Britain
within the next 50 years. Thus, the
American crayfish have a genetic
variation that gives them an ad-
vantage over the British crayfish to
survive and reproduce.
The variation of genes within individual ...
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
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.
Embracing GenAI - A Strategic ImperativePeter 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.
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.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
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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.
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.
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Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
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.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
3. Photosynthesis and Cellular Respiration
Photosynthesis and cellular respiration are
cyclic processes.
The food (organic molecules) produced during
photosynthesis are broken down during cellular
respiration to produce ATP.
In order to produce as much ATP as possible,
the mitochondria needs oxygen.
Photosynthesis is the start of almost all food
chains on Earth.
4. Photosynthesis and Cell Respiration
• Ecosystems depend on the cycling of chemical elements and energy within
the ecosystem.
• All living organisms need a constant source of energy to survive
• Primary source of energy comes from the sun
• Producers/autotrophs can convert sun’s energy into organic
compounds during photosynthesis
• Organic compounds provide a storage unit of energy for cells to
use later
• Energy is released during cellular respiration
5. Photosynthesis
• Ecosystems depend on the cycling of chemical elements and energy
within the ecosystem.
Photosynthesis:
6CO2 + 6 H2O + Sunlight C6H12O6 (sugar/glucose) + 6 O2 (waste)
• Autotrophs remove carbon dioxide from the atmosphere.
• Through a complex biochemical pathway, the carbon dioxide (CO2)
is converted into organic compounds
– Could produce carbohydrates (sugars), lipids, or amino acids
(amino acids can then combine to make proteins)
6. Cellular Respiration
• Cellular Respiration:
C6H12O6 (glucose) + 6 O2 6 CO2 (waste) + 6 H2O +ATP (cellular energy)
– Using complex cellular processes,ALL living organisms break down
organic compounds (even plants).
– When the bonds are broken, energy released can be used to produceATP.
• ATP – molecule used to power cellular reactions,“cellular energy”
8. Question #1:
A certain plant requires moisture, oxygen, carbon dioxide, light,
and minerals in order to survive.This statement shows that a
living organism depends on:
A. Biotic factors
B.Abiotic factors
C. Symbiotic relationships
D. Carnivore-herbivore relationships
9. An ecologist performed a study to determine how the rate of photosynthetic activity in a lake
changed from month to month. The results of the study are shown in the graph above.
What conclusion is best supported by the evidence?
A. Photosynthetic organisms were dormant during the months of April through August.
B.The rate of photosynthesis increased from June through December.
C.The rate of photosynthesis was greater during the months of May through June.
D. Photosynthetic organisms experienced die-off during the months of January through June.
Question #2:
10. Question #3:
The chemical equation below shows the reaction of glucose and oxygen:
C6H12O6 (glucose) + 6 O2 6 CO2 (waste) + 6 H2O + 36ATP (cellular energy)
What process does this equation represent?
A. Photosynthesis
B. Aerobic respiration
C. Anaerobic respiration
D. Nitrogen fixation
11. Question #4:
The process of photosynthesis and respiration can be thought of as a cycle
because:
A. One is used only be plants and the other is used only by animals
B. Both give off oxygen to be used by animals
C.The products of one are used as the raw materials of the other
D.They both have the same purpose
13. Theory of Evolution
Evolution, or change over time, is the process by which
modern organisms have descended from ancient
organisms.
A scientific theory is a well-supported testable
explanation of phenomena that have occurred in the
natural world.
14. Charles Darwin
Charles Darwin was born on February 12, 1809
in Shrewsbury, England.
From 1831 to 1836 Darwin served as naturalist
aboard the H.M.S. Beagle on a British science
expedition around the world.
He observed much variation in related or similar
species of plants and animals that were
geographically isolated from each other.
These observations were the basis for his ideas.
16. Natural Selection
Individuals with favorable traits are more likely to leave more
offspring better suited for their environment.
Also known as:
“Differential Reproduction”
“Descent with Modification”
“Survival of the Fittest”
Example:
English peppered moth (Biston betularia)
- light and dark phases
Other EVIDENCE scientists use to
study evolution include:
- Embryo development, Fossil Record,Anatomy, Protein sequence,
DNA sequence
18. Question #5:
Thousands of years ago, giraffes with short necks were common within
giraffe populations. Nearly all giraffe populations today have long
necks.This difference is due to:
A. Giraffes stretching their necks to keep their heads out of the reach of predators
B. Giraffes stretching their necks so they could reach food higher in the trees
C.A mutation in the gene that controls neck size occurring in some skin cells of a giraffe
D.A mutation in the gene that controls neck size occurring in the reproductive cells of a
giraffe
19. Question #6:
“It is likely that ducks developed webbed feet because ducks that had
webbed feet were able to survive better than ducks without webbed feet,
therefore the trait was passed on to the next generation.” This attempt to
explain the development of webbed feet in ducks matches the theory
proposed by:
A. Jean Lamarck
B. Charles Darwin
C. Gregor Mendel
D. Thomas Malthus
20. Question #7:
Which two processes result in variations that commonly influence the
evolution of sexually reproducing species?
A. mitosis and natural selection
B. extinction and gene replacement
C. mutation and genetic recombination
D. environmental selection and selective breeding
21. The differences in the species are most
likely a result of:
A. Length of mating season
B. population size
C. color of feathers
D. available food source
Question #8:
22. Question #9:
Two closely related species of birds live in the same tree. SpeciesA
feeds on ants and termites, while species B feeds on caterpillars.The
two species coexist successfully because they:
A. Interbreed
B. Compete less for food
C. Share the same food
D. Use different methods of reproduction
23. Question #10:
A.The humerus is attached to the skeleton by
immovable joints
B. Only animals that walk on 4 legs need the
humerus
C.The humerus is the same size in all chordates
D. Chordates have common ancestors
All the organisms shown above belong to the Phylum Chordata. The
structural similarity in the organisms suggests that:
24. Question #11:
Scientists found the fossilized remains of a canine’s jaw and leg. What
information must first be obtained before the scientist can place the fossils in
the ancestral time line of the dog?
A.The continent where the fossils were found
B.The population trends for the species
C.The rest of the skeleton
D.The age of the fossils
25. Question #12:
The diagram shows undisturbed sedimentary rock strata containing fossils.
Which statement best summarizes the history of this area?
A.The area was once a forest and was
replaced by a freshwater lake.
B.The area was once a freshwater lake
and was replaced by a saltwater sea.
C. The area was once a saltwater sea
and later was replaced by a marshland.
D. The area was once a saltwater sea
and later was replaced by a forest.
26. Question #13:
A new antibiotic developed to treat bronchitis (a bacterial infection) has become
widely prescribed by doctors to patients with lung
infections. Over time, the number of patients infected
with an antibiotic resistant form of the bacteria is rising.
Which of these is most likely true about this strain of bacteria?
A.The surviving strain has learned how to become resistant to the
antibiotic.
B. The drug company did not properly test the antibiotic
C. The surviving strain was able to avoid the antibiotic.
D. Those few bacteria that were genetically resistant survived and
reproduced, making this strain of bacteria more common.
28. Important Terms
BIOTIC – all living parts of an environment (humans, plants, mushrooms,
mold, bacteria, algae, birds, etc)
ABIOTIC – all nonliving parts of an environment (water, soil, climate,
temperature, air, shell, pencil)
BIOSPHERE – broadest level of organization
Physical space whereALL living organisms are found
ECOSYSTEM – particular area in biosphere
Includes all biotic and abiotic factors of the area
COMMUNITY – all biotic factors in a particular ecosystem
BIODIVERSITY – many different species living in the community
POPULATION – all members of one species in the ecosystem
29. Living organisms interact & are dependent on their physical environment
As the enviro changes, living organisms need to adapt to survive
Behavioral Adaptation – affects the individual
This adaptation is due to behavioral changes. The individual may move
to a new location, change feeding habits, change migration patterns.
Genetic Adaptation – affects the species, not the individual
This adaptation occurs due to random DNA mutations passed on to the
offspring. If the mutation is beneficial, the offspring will survive and
pass on the mutation to their offspring.
30. Living organisms can cause changes to their physical environment
Ex: worms burrowing, beaver dams, plants releasing oxygen
Humans are the primary cause of environmental change. Humans affect
the balance of natural cycles in the enviro.
Humans can cause such changes in the physical environment that many
species are becoming threatened, endangered or extinct.
Living organisms are dependent (directly or indirectly) on all other living
organisms in the environment.
Living organisms living in the same area form biological communities
(Ecosystems)
31. Types of Terrestrial Biomes
Biomes are classified by the type of plants that grow in the area. The types of plants
that can grow in the area is determined by the abiotic factors of the environment, such
as amount of rain and temperature.
Tundra – cold, very little precipitation; vegetation includes mosses, lichens, small
plants
Taiga (Coniferous Forest) – cold, some precipitation; vegetation includes
evergreen trees
Deciduous Forest – mild temps, more precipitation than taiga and grassland;
vegetation includes large trees such as maple and oak; shrubs
Grassland – mild temps, some precipitation, experiences very wet seasons and
very dry seasons; vegetation includes grasses
Desert – hot, very little precipitation; vegetation includes cacti and some grasses
Tropical Rain Forest – hot, a lot of precipitation; vegetation includes large trees
such as teak and mahogany, highest biodiversity
33. Types of Ecosystem Relationships
Predation – one benefits, the other is harmed
Predators and Prey
Herbivores and Plants
Parasitism – one benefits, the other is harmed
Ectoparasite – external parasite, live on host
Endoparasite – internal parasite, live in host
Competition – has a negative effect on both
Mutualism/Symbiotic – both benefit
Commensalism – one benefits, the other is not harmed
34. Question #14:
In the graph below, what is the population of deer at the carrying
capacity of the environment?
A. 10
B. 30
C. 50
D. 70
35. Question #15:
Cutting down a rain forest and planting agricultural crops, such as coffee
plants, would result in:
A. a decrease in erosion
B. a decrease in biodiversity
C. an increase in the amount of photosynthesis
D. an increase in the amount of energy recycled
36. Question #16:
The island of Aldabra lies 400 km off the coast of Africa and is home to
theAldabra Rail, the last surviving species of flightless bird in the area.
TheAldabra Rail is much different from Rails living on the mainland.
This bird became a distinctly different species through:
A. Reproductive isolation
B.Adaptive radiation
C. Convergence
D. Geographic isolation
37. Question #17:
Which level of this food pyramid represents the largest biomass?
A. Bass
B. Minnows
C. Copepods
D.Algae
38. Question #18:
Scientists hypothesize that oxygen began to accumulate in Earth’s
atmosphere after the appearance of living things with the ability to:
A. Breathe air
B. Form tissues
C. Photosynthesize
D. Reproduce sexually
39. Question #19:
Rainfall in a tropical region is below average for 10
consecutive years. Insect species adapted for dry
conditions are much more plentiful at the end of
the 10 years.
Which of the following statements explains the
increase in the population of the insects?
A. Biodiversity in the region has increased due to
the dry conditions
B. Insects with a high tolerance for dry conditions
have migrated out of the region
C. Natural selection has favored insect species with
a high tolerance for dry conditions
D. Natural selection has selected against insect
species that are adapted for dry conditions
40. Question #20:
There are fewer than 3,000 manatees
(Trichechus manatus) left in the world.
Which would probably cause the extinction of the species?
A. A sudden freeze in the northern range of the manatees
B. Increases in the range of the manatees
C. Spread of disease that reduced the reproduction rate of the species
D. Increases in noncompeting species in the manatees’ habitat
41. Humans sometimes kill giant tritons in order to collect their attractive spiral
shells. If humans kill most of the giant tritons in a coral reef, the coral
population will most likely:
A. Decrease due to a decrease in the parrot fish population
B. Increase due to an increase in the parrot fish population
C. Increase due to a decrease in the crown-of-thorns sea star population
D. Decrease due to an increase in the crown-of-thorns sea star population
Question #21:
Crown-of-thorns Sea Star
(Acanthaster planci)
Brain Coral
(Diploria labyrinthiformis )
GiantTriton
(Charonia tritonis)
Parrot Fish
(Sparisoma viride)
42. Question #22:
All of Earth's water, land, and atmosphere within which life
exists is known as:
A. Population
B. Community
C. Biome
D. Biosphere
43. Question #23:
One possible reason for the rise in the average air temperature at Earth’s
surface is that:
A. Decomposers are being destroyed
B. Deforestation has increased the levels of O2 in the atmosphere
C. Industrialization has increased the amount of CO2 in the air
D. Growing crops is depleting the ozone shield
44. Question #24:
A rocky island appears as oceanic waters recede.Which of the
following forms of vegetation would probably appear first on the
bare rocks?
A. lichens
B. weeds
C. shrubs
D. pioneer trees
45. Question #25:
Which best explains why a pyramid is used to
represent energy flow within an ecosystem?
A.Available energy increases when moving
up an energy pyramid.
B.Available energy decreases when moving
up an energy pyramid.
C.The size of the organism decreases when
moving up an energy pyramid.
D.The population size of the organisms
increases when moving up the energy
pyramid.
46. What would most likely happen if the rabbit
population decreased as a result of another
predator being introduced to the food web?
A.The fox population would decrease
B.The food web would not be affected
C.The bird population would increase
D.The spider population would
decrease
Question #26:
47. What statement best explains what is happening at PointA?
A. Population growth decreases as individual crabs get older.
B.The population is stabilizing as it approached carrying capacity.
C. Destruction of habitat is causing a decline in the crab population
D.The introduction of a new predator is causing a decline in the population
growth of the crabs.
Question #27:
Crab Growth on a Coral Reef
Number of Generations
PopulationSize
48. Which statement is supported by the information shown in the graph?
A.The oxygen consumption of an organism is one-half its body mass.
B.The oxygen consumption of an organism is not related to its body mass.
C.As the body mass of an organism increases, oxygen consumption decreases.
D.As the body mass of an organism decreases, oxygen consumption decreases.
Question #28: