Which of the following options is correct based on the statements given below?
Statement 1: Gaseous exchanges in plants usually occur on the top side of leaves.
Statement 2: Tiny pores called stomata facilitate this exchange.
Statement 3: The gases exchanged are carbon dioxide and water vapour only.
Only statement 2 is correct.
Tiny pores called stomata are responsible for the exchange of gases in the leaves and stems of the plant. These gases include carbon dioxide and water vapour as well as oxygen. Thus statement 3 is incorrect.
While it is true that some plants such as water lilies have stomata on the top side of their leaves, most plants, however, have it on their underside. Thus, statement 1 is incorrect. But all gaseous exchanges in plants occur through tiny pores present on leaves called stomata.