Question

Tiny pores are found on the surface of the leaves of plants. These pores are called stomata. These stomata surrounded by the kidney shaped guard cells provide many vital functions to the plants.Which of the following functions is not served by the stomata for the plants?

2 points

(a) Exchange of gases, particularly CO2 and O2, with atmosphere

(b) Loss of water in the form of vapours during transpiration

(c) Helps to create pressure for the water to rise upward, by its process of transpiration

(d) Helps the leaves to carry out the process of photosynthesis
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Answer 1

Answer:

c

Explanation:

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Answer 2

Answer:

Option (d) Helps the leaves to carry out the process of photosynthesis​

Explanation:

• Stomata are the tiny openings or apertures present on the epidermal surfaces of leaves and young stems. Each stoma is surrounded by two specialized kidney-shaped guard cells with the presence of chloroplasts.

• Stomata allow a plant to take in CO₂ needed for photosynthesis and release out O₂ thus performing the function of gaseous exchange between plants and the atmosphere.

Thus option (a) is correct.

• Transpiration causes a cooling effect in plants. This occurs through the stomata present on the leaves and green stems. majority of total water gets transpired through these stomata which are called stomatal transpiration or foliar transpiration.

Thus option (b) is correct.

• During the process of stomatal transpiration, water evaporates from mesophyll cells resulting in an increased DPD in these cells. This pressure deficiency in the leaf cells is further passed on to the xylem sap in close contact and ultimately to the root cells. This allows the upward movement of water.

Thus option (c) is correct.

• All the photosynthetic ingredients like CO₂ and water, sunlight, and chlorophyll molecules help the leaves to carry out photosynthesis. Stomata is the pore that doesn't directly play a role to perform photosynthesis.

Thus option (d) is not served by stomata for the plants.

​Hence option (d) Helps the leaves carry out the process of photosynthesis is the correct answer.

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