Question

When pistillate and bisexual flowers develop on different plants. The condition is ____
A) Gynodioecious
B) Gynomonoecious
C) Polygamodioecious
D) Polygamodioecious

Answer 1

Hint:A flower is known as the reproductive structure of the plants that bear them. Flowers may either undergo self pollination or cross pollination to finally give rise to offspring.

Complete answer:
 A flower most commonly consists of the floral axis that bears the essential organs for reproduction that is the stamen and pistil and also sepals and petals. The flower essentially comprises four distinct whorls- the calyx that consists of sepals, the corolla that consists of petals, the androecium which consists of stamens and the gynoecium that consists of pistils. The androecium is the male part of the flower and the gynoecium is the female part of the flower. The sepals and petals comprise the perianth. The androecium comprises anther and stamen whereas the gynoecium comprises ovary and stigma. Pistillate flowers are those that consist of only pistils, that is the female part and no stamens. A pistil may comprise of simple or compound carpels. Bisexual flowers are those that consists of both male and female parts and are highly prone to undergo self pollination. So a condition where the pistillate and bisexual flowers develop on different plants is called gynodioecious.

Hence the correct answer is option (A) Gynodioecious.

Note: Gynodioecious plants are very rare but it has few advantages such as more flowers, better germination rate and greater seed production. Few examples of such plants are Wild thyme, Silene, Beta vulgaris, etc.