Question

1)How many nuclei are present in a zygote?
2) what do you mean by brooding ?

Answer 1

Answers: 1)it has only one nucleus, it is single cell.sperms and ova are haploid cells (n) while zygote is a diploid cell (2n). 2)Brooding, in zoology, pattern of behaviour of certain egg-laying animals, especially birds, marked by cessation of egg laying and readiness to sit on and incubate eggs.Incubationitself is the process of maintaining uniform heat and humidity of the developing eggs, usually accomplished by one or both parents sitting on the eggs at all times.