Question

Stomata are present on the underside of the _ _ _ _ _ _ _
A) Flower
B) Fruit
C) Seed
D) Leaf

Answer 1

Hint:Stomata are structures that help in exchange of gases. They help in exchange of carbon dioxide during photosynthesis and oxygen during respiration in plants.

Complete answer:
Stomata are small pores that control the exchange of gases in plants. They are bordered by guard cells which are specialized parenchyma cells and responsible for regulating the size of the stomatal opening. Air enters the plants through these openings by diffusion and absorbs carbon dioxide during photosynthesis and leaves out oxygen in respiration. Let us analyze the options to find out the correct answer that where stomata are present.
>Option A: Flower which is also called blossom is the reproductive structure of the flowering plants. It is involved in the process of reproduction as it is involved in fusion of female eggs with male sperm.Therefore, this is the incorrect option.
>Option B: Fruit of a plant is a mature ovary which usually contains seeds. These seeds have developed from the enclosed ovule after fertilization.Therefore, this is the incorrect option.
>Option C: Seed is an embryonic plant which is usually covered by a protective covering. The formation of seeds in the plants are a part of the plant’s process of reproduction.Therefore, this is the incorrect option.
>Option D: Leaves are flat structures of a plant that is the site for photosynthesis. They are usually green colored due to the presence of a green color pigment called chlorophyll. They are the vital organs for respiration and photosynthesis. They have the presence of stomata which are small pores responsible for exchange of gases. They are present on the underside of the leaves. Therefore, this is the correct option.

Thus the correct answer is option ‘D’.

Note:These stomata also help in release of excess water in the form of water vapour through a process of transpiration. These stomata are present in the sporophyte generation except liverworts.