1
Question
Which of the following options are correct based on the statements given?
Statement 1: Gaseous exchange in plants usually occurs 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.
Which of the following options are correct based on the statements given?
Statement 1: Gaseous exchange in plants usually occurs 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.
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Solution
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 by-product 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, many plants, however, have them on their underside. Thus, statement 1 is incorrect.
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 by-product 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, many plants, however, have them on their underside. Thus, statement 1 is incorrect.
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