Question

Zygospore is formed from:
A. Gametangial copulation
B. Gametic union
C. Zygote
D. Oogamy

Answer 1

Hint: The term Zygospore means thick walled resting cell of certain fungi and algae which arises from the fusion of two similar gametes.

Complete Answer:
A. Gametangial copulation: Gametangial copulation is the fusion of the entire contents of two contacting gametangia. In gametangial copulation, male and female gametangia come in close contact with each other and get fused.

B. Gametic union: The word Gamete means haploid number of chromosomes which is capable of fusing with a gamete of the opposite sex to produce a zygote. Gametic union is also known as Apomixis. It is a mode of asexual reproduction.

C. Zygote: Zygote can be defined as a cell that starts the process of forming an infant or animal by the fusion of male and female gametes. Tt gives rise to blastomeres; later the single cells gradually become subdivided into smaller cells. It consists of all the genetic information needed to form a new individual.

D. Oogamy: Oogamy is a system of sexual reproduction in which the larger gamete is the egg and it is motile whereas the other gamete is small and motile. The larger gamete is an egg and the smaller one is the sperm. It is a form of anisogamy.

Note: Zygospore are mostly found in mucor. Zygospores are characteristic of the zygomycete fungi which are generally thick walled and darkly coloured. With the fusion of the two haploid cells the zygospores are formed in Zygosporangia.