Question

The flower shown in the adjacent diagram is:

a) Homochlamydeous unisexual and hypogynous
b) Homochlamydeous bisexual and epigynous
c) Dichlamydeous bisexual and hypogynous
d) Heterochlamydeous bisexual and epigynous

Answer 1

Hint: Unisexual flowers have male and female reproductive organs on different flowers and the flowers having both male and female reproductive organs present in the same flower are said to be as bisexual. When the calyx and corolla are seen distinct in a flower, it is said to be as dichlamydeous/Heterochlamydeous while the flower having a perianth not differentiated into calyx and corolla are Homochlamydeous flowers. The flowers in which gynoecium occupies the highest position and have a superior ovary are said to be as hypogynous flowers and the ones which have an inferior ovary are epigynous flowers.

Complete answer:
Homochlamydeous unisexual and hypogynous: As we can see the flower has both the organs, the calyx and corolla are also differentiated, option (a) is incorrect
Homochlamydeous bisexual and epigynous: The flower has differentiated calyx and corolla and a superior ovary can be seen; therefore option (b) is incorrect.
Dichlamydeous bisexual and hypogynous: Since the flower has a well differentiated calyx and corolla, also has both the organs and also a superior ovary can be seen, hence, option (c) is correct.
Heterochlamydeous bisexual and epigynous: As the flower is not epigynous because the ovary is seen to be superior, this option (d) is incorrect.

So, the correct answer is option (c).

Note:
Examples of Hypogynous flowers: brinjal, mustard, china rose; Perigynous flower: plum, rose, peach; Epigynous flowers: ray florets of sunflower, guava, cucumber. Example of unisexual flowers: papaya, watermelon; bisexual flowers: tulip, sunflower, lily. Examples of Heterochlamydeous flowers: Allamanda; Homochlamydeous flowers: michelia.