Question

What is the function of thin flexible petiole?

• A. It helps the leaf blade to decrease surface area
• B. It increase the rate of respiration
• C. It allows leaf blade to flutter in wind there by cooling the leaf
• D. It decrease the rate of transpiration

Answer 1

The correct option is C It allows leaf blade to flutter in wind there by cooling the leaf

Petioles attach the leaves to the stem. The benefit of a long, thin and flexible petiole is that it allows the leaf to flutter in the wind and thereby cooling the leaf.

The rate of respiration depends on the number and arrangement of stomata, temperature, light, etc and the petiole doesn't affect its rate.

So the correct answer is ' It allows leaf blade to flutter in wind thereby cooling the leaf'.