The document summarizes plant structure and functions. It describes that the root system anchors the plant, absorbs water and minerals from the soil, and stores food. The shoot system produces sugars through photosynthesis, carries out reproduction, and transports water and nutrients. The shoot and root systems are interdependent, with the root system absorbing water and minerals from the soil and the shoot system producing sugars and transporting them throughout the plant.
Discussion of the functions of leaves, focusing on Photosynthesis and the process. Also covers transpiration, O2 CO2 transfer, germination. Appropriate for high school level students.
Discussion of the functions of leaves, focusing on Photosynthesis and the process. Also covers transpiration, O2 CO2 transfer, germination. Appropriate for high school level students.
Biology GCE O level syllabus: Transport system in Plants
Include: Xylem, Phloem, Entry of water into plant and so forth...
NOTE: PLEASE DOWNLOAD BECAUSE THERE ARE MANY ANIMATIONS THAT HIDE SOME OF THE CONTENTS
Biology GCE O level syllabus: Transport system in Plants
Include: Xylem, Phloem, Entry of water into plant and so forth...
NOTE: PLEASE DOWNLOAD BECAUSE THERE ARE MANY ANIMATIONS THAT HIDE SOME OF THE CONTENTS
Part I
Explain the need for transport systems in multicellular plants
Describe the distribution of xylem and phloem tissue in roots, stems and leaves
Explain the absorption process in roots
Describe transport mechanisms
Part II
List factors that affects rate transpiration
Describe xerophyte properties
List the series of events that leads to translocation
More for teachers who do not have much science background than for students. Discusses the ideas of cycles and systems and goes into some detail about some representative sample cycles.
This could be followed by the water cycle slide show:
http://www.slideshare.net/MMoiraWhitehouse/teach-water-cycle-copy
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
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
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.
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
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.
2. Shoot
System
Root
System
Root system
- anchors the plant
- penetrates the soil and
absorbs water and minerals
- stores food
Shoot system
- produces sugars by
photosynthesis
- carries out
reproduction
-transport
Shoot and Root Systems
4. Leaf Functions
Manufacture food through photosynthesis
Gas (Air) Exchange – Respiration
Protect vegetative and floral buds
Water Transport – Transpiration
Store Food During Germination
10. Respiration is the release of the energy
derived from the food created by
photosynthesis.
* It is the opposite of photosynthesis (one
molecule of glucose and six molecules of
oxygen are broken up and reorganized by
enzymes to give six molecules of carbon
dioxide and six molecules of water.
11. Usually, photosynthesis will produce more glucose than is needed by
the plant.
The excess sugars are stored and
transformed into
starch, cellulose, lipids (fats) and
other carbohydrates, proteins and
sucrose.
12. Other Functions of Leaves
While Photosynthesis
is a very important
part of the function
of leaves, they have
other responsibilities
to the plant
13. Leaves protect buds through the
winter
Juniper
Mango
Protect Vegetative and Floral
Buds
Leaves protect floral bracts during
development
Poinsettia
Globe artichoke
14. Important in the Water Cycle
Leaves are a very
important part of
the water
cycle, helping
provide
atmospheric
water.
15. Why are leaves the perfect
place for photosynthesis?
Leaves are thin and broad in order to
have a great amount of surface area for
sun and CO2 absorption
Like mini solar panels
Palisade Mesophyll Layer was right below
the upper epidermis
collected the most sunlight
CO2 diffuses across short distances
Large spaces between cells provide easy
passage for CO2 to diffuse
Many stomata in the lower surface
More chloroplasts in the upper surface
Branching network of veins
16. Lets look at the whole plant…
The three major
organs are:
1. Leaf
2. Stem
3. Root system
17. Organs of the plant: Leaf
Collect sunlight
Exchange oxygen and carbon dioxide
Site of photosynthesis
18. Organs of the plant: Stem
Supports plant body
Spaces out the leaves and helps them
compete for sunlight and carbon
dioxide
Helps pollination and later dispersal of
the seeds (holding the flowers above the
ground)
Transports nutrients and also water and salts
19. Organs of the plant: Root
Absorbs water, dissolved nutrients from soil
Anchors the plants
Holds the plants upright
Prevents plants from getting
knocked over
Stores food
Complex structure
Branching network
25. Stomata are open during
daylight but closed during
the evening
Stomata allow carbon
dioxide into the leaf (for
photosynthesis) and
prevent excessive loss of
water vapour
High potassium
concentrationlow water
potentialwater enters the
guard cells stoma opens
26. Plant Tissues: Vascular Tissue
Transport water and nutrients
Throughout the plant
Xylem
Transports water and salts from roots
Conducting cells are dead and
Hollow at maturity VESSELS
Phloem
Sugar and amino acids are transported
from the leaves to pares of the plants
requiring food SIEVE TUBES
The pressures gradient that moves this is
created via the concentration of sugars
Dissolved food transport is called translocation
27. Xylem
• Conducts water and
dissolved minerals
• Conducting cells are dead
and hollow at maturity long
cells joined end to end
• Cell walls are impregnated
with LIGNIN + FIBRES cell
wall is IMPERMEABLE
cytoplasm dies/ no nuclei
vessel
member
tracheids
28. PITH
PITH is the CENTRAL tissue of the stem
These tissues serve also as supporting tissue and
contribute to the stem’s rigidity.
29. Phloem:
A Complex Vascular Tissue
Transports sugars
Main conducting cells
(alive) are sieve-tube
members NO
NUCLEI
Companion cells
assist in the loading of
sugars
sieve plate
sieve-tube
member
companion
cell
32. Root Structure
Root cap covers tip
Vascular bundle in the
centre
Region of cell division
Region of elongation
root cap
33. Root Hairs and Lateral Roots
Root hairs are tiny extensions of
epidermal cells
Root hairs to take up water
(OSMOSIS) and absorb mineral
salts (ACTIVE TRANSPORT). THEY
INCREASE THE ABSORBING AREA
OF THE ROOT
Different kinds of roots: TAP root
and FIBROUS root
(ADVENTITIOUS is a kind of
FIBROUS)
new
lateral
root
34. Turgor Pressure
Turgor pressure
is when
water(inside the
vacuole)
presses on the
cell wall –
inflating the cell
Soft plants have
lots of soft tissue
that needs a
regular supply
of water
This is what
happens
when plants
don’t have
enough water
35. Air Exchange in Plants
Stomata let oxygen out, carbon dioxide in
During the day CO2 defuses into the cell and H2O and O2 defuse out
During the night and when only respiration is happening CO2 defuses out
and O2 defuses in.
Guard cells regulate the stomata
If they absorb water they become turgid (swollen) and open the stoma.
Exchange takes place
in Spongy mesophyll
kept moist to allow
air exchange
Guard Cells
36. Water exchange
Also takes place in Spongy Mesophyll
The process of water evaporating from plants
to environment is TRANSPIRATION
Water is lost from the leaves
Replaced by water from
Xylem in vascular tissue
37. Minerals
H2O
CO2
O2
CO2 O2
H2O Sugar
Light
A variety of physical processes
are involved in the different types of transport
Sugars are produced by
photosynthesis in the leaves.5
Sugars are transported as
phloem sap to roots and other
parts of the plant.
6
Through stomata, leaves
take in CO2 and expel O2.
The CO2 provides carbon for
photosynthesis. Some O2
produced by photosynthesis
is used in cellular respiration.
4
Transpiration, the loss of water
from leaves (mostly through
stomata), creates a force within
leaves that pulls xylem sap upward.
3
Water and minerals are
transported upward from
roots to shoots as xylem sap.
2
Roots absorb water
and dissolved minerals
from the soil.
1
Figure 36.2
Roots exchange gases
with the air spaces of soil,
taking in O2 and discharging
CO2. In cellular respiration,
O2 supports the breakdown
of sugars.
7
38. Transpiration controlled by…
Guard Cell/Stromata
If water pressure is high (lots of water)
guard cells swell up and open stomata
39.
40. Transport in Plants
Vast amounts of water pass through plants
1% of this water is used by the plant cells for
photosynthesis and turgor
99% evaporates from the leaves and is lost to the
atmosphere
This evaporation from leaves is called transpiration
More than 90% of the water moving up a plant is
lost through transpiration as water vapor through
the stomata.
As the water leaves the the plants the concentration
of solutes increases within the cells, this draws more
water into the cells from the xylem
41. Factors affecting Transpiration
Light Light stimulates the stomata to open
allowing gas exchange for
photosynthesis, and as a side effect this also
increases transpiration. This is a problem for
some plants as they may lose water during
the day and wilt
Temperature High temperature
increases the rate of evaporation of
water from the spongy cells, and
reduces air humidity, so transpiration
increases
42. Humidity High humidity means a higher water
potential in the air, so a lower water potential
gradient between the leaf and the air, so less
evaporation
Air movements Wind blows away saturated air from
around stomata, replacing it with drier air, so
increasing the water potential gradient and
increasing transpiration