Question

Given below are five statements (i-v) regarding contrivances to ensure cross-pollination in plants
(i) Dicliny - Anthers and stigmas mature at different times in a bisexual flower.
(ii) Dichogamy - Flowers are unisexual.
(iii) Prepotency - Pollen grains of the same flower germinate more rapidly over the stigma than the pollen grains of another flower.
(iv) Heterostyly - Two or three types of flowers with different heights of styles.
(v) Herkogamy - A mechanical device to prevent self-pollination.
Which of the above statements are correct?

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

Answer 1

Answer: (D)

Dicliny - Flowers are unisexual so that self pollination is not possible
Dichogamy - Anthers and stigmas mature at different times in a bisexual flower so as to prevent self pollination.
Prepotency - Pollen grains of another flower germinate more rapidly over the stigma than the pollen grains of the same flower.