Question

Which among the following statements are true for unisexual flowers?

(i) They possess both stamen and pistil.

(ii) They possess either stamen or pistil.

(iii) They exhibit cross-pollination.

(iv) Unisexual flowers possessing only stamens cannot produce fruits.

• A. (i) and (iv)
• B. (ii), (iii), and (iv)
• C. (iii) and (iv)
• D. (i), (iii), and (iv)

Answer 1

The correct option is B

(ii), (iii), and (iv)

The correct option is B.

The explanation for the correct option:

1. Flowers that solely have male or female reproductive organs are known as unisexual flowers.
2. They may or may not have stamen or pistil.
3. Because there is just one reproductive organ, thus, cross-fertilization occurs, in which gametes are produced by two distinct plants.
4. Fruit only develops from female flowers, hence fruit cannot be generated by unisexual plants with male flowers (stamen).

The explanation for the incorrect option:

Option A:

Unisexual flowers bear only male or female flowers, never both at the same time. Thus, Option (i) is incorrect.

Option C:

Option (i) is incorrect.

Option D:

Option (i) is incorrect.

Final answer: They possess either stamen or pistil, They exhibit cross-pollination, and Unisexual flowers possessing only stamens cannot produce fruits are true statements regarding unisexual flowers.