Question

Adventive polyembryony is an example of
 A. Vegetative propagation
 B. Amphimixis
 C. Agamospermy
 D. Parthenogamy.

Answer 1

Hint: Adventive polyembryony involves formation of embryo from the diploid sporophytic cells of ovule such as integuments and nucellus. Sometimes it may lead to formation of more than one embryo within a single seed.

Complete answer:
Plants reproduce mainly by sexual and asexual mode of reproduction. Sexual mode of reproduction involves fusion of male and female gametes, whereas asexual mode of reproduction occurs without any fusion of gametes.
Adventive polyembryony is also a type of asexual mode of reproduction in which asexual seeds are produced without fertilisation of gametes called syngamy that is, an embryo is formed within the seed coat without syngamy.
Option ‘A’ is vegetative propagation is an asexual mode of reproduction in which successive mitosis of specialized vegetative tissues like bulbs, tubers, cuttings, buds, etc, are developed to a new plant and result into a clonal population.
Option ‘B’ is amphimixis is a synonymous term used for sexual reproduction which means fusion of male and female gametes inside the female or outside the female to form zygote, which further develops into a new organism.
Option ‘C’ is Agamospermy which is a type of asexual reproduction in which seeds or zygote is formed from unfertilized ovules in the female body. These seeds are also known as apomictic seeds or asexual seeds. Embryo is formed without syngamy inside the seed coat.
Option ‘D’ is Parthenogamy involves formation of new seed without fusion of compatible gametes. It involves fusion of two incompatible gametes that are female gametes only, to form new individuals. Examples are bananas, apples, etc.

So, after this discussion we can conclude that option ‘C’ is the correct answer for this question. Adventive polyembryony is the example of Agamospermy.

Note: Parthenogamy is an asexual reproduction, it only mimics the sexual reproduction. Because it involves both female gametes whereas in sexual reproduction male and female gametes fuse to give rise to a new individual.