Question

Which of the following options is correct based on the statements given?

Statement 1: Gaseous exchanges in plants usually occur on the dorsal side of leaves.

Statement 2: Tiny pores called stomata facilitate this exchange.

Statement 3: The gases exchanged are carbon dioxide and water vapour only.

• A. Only statements 1 and 3 are correct.
• B. Only statement 2 is correct.
• C. All statements are correct.
• D. Only Statements 2 is correct.

Answer 1

The correct option is B

Only statement 2 is correct.

Tiny pores called stomata are responsible for the exchange of gases in the leaves and stem of the plant. These gases include carbon dioxide and water vapour as well as the byproduct oxygen. Thus statement 3 is incorrect.

While it is true that some plants such as water lilies have stomata on the dorsal side of their leaves, most plants, however, have it on their ventral side. Thus, statement 1 is incorrect.