Which of the following options is correct based on the statements given?
Statement 1: Gaseous exchanges in plants usually occur on the top side of leaves.
Statement 2: Tiny pores called stomata to facilitate this exchange.
Statement 3: The exchange of water vapour and carbon dioxide takes place through stomata.
Which of the following options is correct based on the statements given?
Statement 1: Gaseous exchanges in plants usually occur on the top side of leaves.
Statement 2: Tiny pores called stomata to facilitate this exchange.
Statement 3: The exchange of water vapour and carbon dioxide takes place through stomata.
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. During photosynthesis, carbon dioxide is taken in through the stomata and oxidised to form glucose, water vapour, and oxygen. This reaction takes place in the presence of chlorophyll and sunlight. So the exchange gases like oxygen, carbon dioxide, and water vapour take place through stomata. 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.
Only statement 2 is correct.
Tiny pores called stomata are responsible for the exchange of gases in the leaves and stem of the plant. During photosynthesis, carbon dioxide is taken in through the stomata and oxidised to form glucose, water vapour, and oxygen. This reaction takes place in the presence of chlorophyll and sunlight. So the exchange gases like oxygen, carbon dioxide, and water vapour take place through stomata. 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.
