Help!!!!!!!!!!!!!!!!!!!!!
The diagram below shows a microscopic view of the lower epidermis of a maple leaf. The cell indicated by the letter B is a guard cell. Guard cells are found on each side of the stomata.

Which of the following statements correctly describes how guard cells affect the physiological processes in a leaf?


A. Guard cells shrink to let in pollen for plant reproduction and swell to keep in oxygen.

B.Guard cells shrink to let in carbon dioxide for photosynthesis and swell to limit transpiration.

C. Guard cells shorten to let in light for photosynthesis and elongate to keep water from entering the cell.

D. Guard cells become rounder to let in oxygen for cellular respiration and flatten out to block the release of carbon dioxide.

Answer:

D is the answer of your quest.

Explanation:

D

The statement that correctly describes how guard cells affect the physiological processes in a leaf is as follows:

Thus, the correct option is B.

Photosynthesis may be defined as a type of process through which green plants and photosynthetic algae generally prepare their own food in the form of glucose with the help of carbon dioxide and water in the presence of sunlight.

Guard cells generally mediate the opening and closure of stomata. With the help of this activity, they regulate the rate of transpiration. Guard cells swell up and open the stomata for the exchange of gases when the plant has an excess of water and other useless gases. These types of cells are generally identified by their kidney-shaped appearance that surrounds the stomata.

Therefore, the correct option for this question is B.

To learn more about Guard cells, refer to the link:

https://brainly.com/question/83099

#SPJ2

An air mass acquires the temperature and humidity of its source region.
True
False

True or False

When two male lions fight over a dead zebra, it is called interspecific competition

True or False

Decomposers are fungi that break down decaying plants and animals

True or False

Bears are known to eat berries as well as fish and meat. Bears are omnivores.

When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?​

consider the photo provided what is the photo representing and list two things you know about this process?
Can you guys please answer my question thank you❤️

When reading “This tree starts with our ancient ancestors and leads to many species of hominids that are now extinct, with humans at the tip of the only surviving branch,” what did that make you think about humans? Do you think this indicates that humans are the pinnacle of evolution? Are they? Explain.

Prompt: You are a carbon atom and you have just been exhaled out of a deer. Describe

the journey that you have been on or describe your new adventures. You should include

at least 10 things that you have learned in Unit 4 (cellular respiration, photosynthesis,

carbon cycle, etc).

1. Which body system breaks down starch

what is the difference between fern life cycle and moss life cycle??

Look at the following diagram of the carbon cycle.An image of carbon cycle is shown. The sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. An arrow is shown from the sun towards the left tree marked A. The sun is marked B. There is an arrow from the air above the clouds, marked C, towards the left tree. An arrow from a location close to the ground marked D points towards Dead Organisms, which is a label under the animal. An arrow marked E points from the right tree straight up to the clouds. An arrow marked F points from the animal straight up to the clouds. An arrow marked G points from the factory towards the air above the clouds, C. There is an arrow pointing from the air to the lake labeled Carbonates in Water, an arrow pointing down from dead organisms to Fossils and Fossil Fuels, and an arrow from Fossils to the factory.Which of the following facts is best represented by the arrow pointing from G to C? The chemical energy present in fossil fuels is used to create new forms of energy used for photosynthesis. Energy is conserved because the chemical energy present in fossil fuels is used up completely during burning. The mechanical energy produced on burning fossil fuels is transformed into chemical energy stored in carbon dioxide. Energy is conserved because the mechanical energy produced on burning fossil fuels is less than the chemical energy formed.

Which of the following is not true of mosses, liverworts, and hornworts?

Question 11 options:

They are non-vascular plants.


They have true roots, stems, and leaves.


They grow in moist places.


They are small and low-growin

is 11/12 greater then 2/3 explain

How does the skin protect the body against illness? Select two options.
The skin produces sweat and oil.
The skin acts as a barrier.
The skin identifies and coordinates an immune response.
The skin produces mucus.
The skin causes the body to produce antibodies.

Giving everything!!!!!!!!! Plzzzz help!!!!!!!!!!! ASAP!!
Most forms of vaccination consist of injecting a person with inactive viruses. How do the proteins from the inactive viruses protect the person from later infections by those viruses?

A. The proteins cause a mild infection that prevents the person’s body from responding to later infections.

B. The proteins bond with receptors on the cells of the person so that later active viruses cannot bind with them.

C. The proteins stimulate an immune response, which produces memory cells that can generate antibodies when new active viruses try to infect cells.

D. The proteins remain in the body and serve as a food source for later active viruses instead of feeding on the person’s tissues and causing the infection.

Giving everything!!!!!!!!! Plzzzz help!!!!!!!!!!! ASAP!!
The diagram below shows parts of the human brain.
Which part of the brain is labeled 4 in the diagram?


A. medulla oblongata

B. occipital lobe

C. parietal lobe

D. brain stem

PLEASE HELP IMPORTANT SCIENCE PLEASE -

The diagram below shows a cell placed in a solution.

A cell is shown placed inside a beaker. It is labeled Cell. The solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.

Only water is allowed to move in and out of the cell. What will most likely happen to the cell?

A. It will expand as water moves out of it.
B. It will shrink as water moves out of it.
C. It will expand as water moves into it.
D.It will shrink as water moves into it.

What is NOT a function of the nucleus?

What are the differences between active transport and passive transport

(HELP ASAP I'LL GIVE YOU BRAINLIEST)
To be a strategic thinker, one must anticipate changes and forces in the external environment.

A.
True

B.
False

Which of the following is a function of lipids?
A.They act as genetic material.
B.They increase the rate of reactions .
C.They form chains of amino acids .
D.They store energy for the cell.

Which one of the following is an example of intrinsic motivation?
Studying for a test because you want to feel proud of your performance
Going to work to get a paycheck
Buying new clothes to impress your significant other
Being nice to your boss in the hopes that she will give you a promotion

2. Which organisms should be the least common?

Where do lizards get their tail length

Please help !❗❗❗❗❗❗❗❗❗❗❗❗❗❗

Parasitic fungi get their food by ____________.

Question 5 options:

absorbing dead or decaying organisms.


helping the host.


harming the host.


not harming the host, but not helping it.

A polypeptide only becomes a functioning protein after it has folded into its exact 3D shape.

True
False

The innate (non-specific immunity) immune system Select one:

A. is based on phagocytes and antimicrobials contained therein

B. kills bacteria according to the same principle as immunoglobulins

C. requires recognition of a surface epitope by immunoglobulins

D. None​

(WILL GIVE BRAINLIEST ONLY IF CORRECT!!) How is the dispersive model different from the semiconservative model of DNA replication?
1. In the dispersive model, each strand of both daughter molecules contains a mixture of old and newly synthesized DNA, and in the semiconservative model, each new double helix consists of one old and one new strand.
2. In the dispersive model, the old double helix is degraded, and in the semiconservative model half of its nucleotides are used in the construction of two new double helices.
3. In the dispersive model, one of the two resulting double helices is made of two old strands, and in the semiconservative model the other is made of two new strands.
4. In the dispersive model, one strand of the new double helix is made of DNA, and in the semiconservative model the other strand is made of RNA.

Which is larger, 40 centimeters or 670 millimeters?​

Which statement is FALSE about Redi & Pasteur’s experiments?

Question 1 options:

Redi’s independent variable was jar coverings.

Pasteur’s independent variable was boiled broth.

Pasteur’s dependent variable was the growth of microbes (bacteria).

Both experiments were conducted gather evidence to disprove spontaneous generation.

This is another day with IXL pls help last question

Which sequence best describes asexual reproduction?

A. 1 parent cell - 2 genetically identical offspring cells

B. 1 parent cell - 4 genetically different offspring cells

C. 2 parent cells 4 genetically identical offspring cells

D. 2 parent cells - 1 offspring cell with a combination of genes from its parents​