Question

Terrestrial plants have stomata on the surface of their leaves. A single stomata is surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma. Which of the following best explains how the structure of the leaf is used in processes that occur in plants?
A. Water enters the plant through the surface of the leaf for transpiration
B. Gases for photosynthesis are exchanged through the surface of the leaf.
C. Energy for cellular reproduction is absorbed through the surface of the leaf.
D. Carbon dioxide enters the plant through the surface of the leaf for cellular reproduction.

Answer 1

Answer:

The correct option is B.

Explanation:

Terrestrial plants refers to plants that live on land. These plants have leaves that have stomata scattered all over their surfaces. The major functions of the stomata is to allow for exchange of gases and transpiration. During photosynthesis, plants take in carbon dioxide and release oxygen to the environment. This gas exchange takes place through the stomata. So also, during the day, when the temperature is high, plant loses water to the atmosphere during transpiration by evaporation. The guard cells that surround the stomata close up when the plant is loosing too much water otherwise they remained open. Thus, the guard cells serve to control the amount of water that is lost by the plants thorough the stomata.