Question

Question 17
Which of the following statements are true about 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

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

The flower may be unisexual (papaya, watermelon) when it contains either stamens or pistil. They exhibit cross-pollination, i.e., the transfer of the pollen grains from the anther of one plant to the stigma of the other plant. Unisexual flowers possessing only stamens cannot produce fruits since it needs both male and female gamete to produce a zygote.