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Question
Statement 1: Gaseous exchange in plants occur only from the dorsal side of leaves.
Statement 2: Tiny pores called stomata facilitate the gaseous exchange.
Statement 3: The gases exchanged are carbon dioxide and water vapour only.
Statement 1: Gaseous exchange in plants occur only from the dorsal side of leaves.
Statement 2: Tiny pores called stomata facilitate the gaseous 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 stems 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.
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 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.
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