Select all that are true regarding gas exchange in a vascular plant.

*Guard cells regulate whether stomata are open or closed based on availability of water in the plant.

*Plants that live in dry environments have adaptations such as reduced leaves (such as needle-shaped leaves) to reduce water loss as much as possible.

*When stomata are closed, the plant is not able to exchange oxygen and carbon dioxide gas with the atmosphere.

*Oxygen gas from the atmosphere enters leaf stomata, and carbon dioxide gas leaves.

*Stomata are open when a plant is low on water, and closed when a plant has plenty of water.

*Plants close their stomata to reduce water loss.

*Guard cells regulate whether stomata are open or closed based on availability of sugars in the plant.

*Transpiration is loss of water vapor from leaves.

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*Transpiration is loss of water vapor from leaves.

Guard cells regulate whether stomata are open or closed based on availability of water in the plant.

Plants that live in dry environments have adaptations such as reduced leaves (such as needle-shaped leaves) to reduce water loss as much as possible.

When stomata are closed, the plant is not able to exchange oxygen and carbon dioxide gas with the atmosphere

.Oxygen gas from the atmosphere enters leaf stomata, and carbon dioxide gas leaves.Plants close their stomata to reduce water loss.

Transpiration is loss of water vapor from leaves.

The above factors are mechanism of respiration for regulation of water vapour contents of the plants, In order to control the mechanisms of respiration, the stomata opening and closing control by the guard cells is important.

Generally the fluctuation of water in the epidermal cells of the guard cells control the stoma. However,sugar  control the closure of guard cells. Generally conservation of water vapour is important to plant survival.

Explanation:

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.