Question

Which of the following is the effect of a plant hormone. which is synthesized more in the absence of light?

• A. Promotes the development of seedless fruits
• B. Responsible for closing of stomata
• C. Induces the dormancy of seeds
• D. Length of internodes increases

Answer 1

The correct option is A Promotes the development of seedless fruits

Auxin is the plant hormone synthesized more in the absence of light. This is proven by the bending of plant shoots towards the light as a result of auxin accumulation on the side of the plant not receiving light (darker side) and thereby more growth of cells on that side. Natural and artificial auxins supplied exogenously to unpollinated flowers induce fruit growth in plants, suggesting that these hormones can replace the signals provided by pollination and fertilization. This promotes the development of seedless fruits. So, the correct option is 'Promotes the development of seedless fruits'.