LIFE SCIENCE

Detailed explanation-1: -Prezygotic barriers isolate the organisms before the zygote is formed. A zygote is the fertilized egg created when two gametes (the sex cells-in humans referred to as egg and sperm) meet. Postzygotic barriers affect the offspring created after the zygote has formed.

Detailed explanation-2: -Prezygotic barriers occur before fertilization, making it unlikely or impossible for members of different species to mate. Examples of these barriers include differences in habitats, mating rituals and genitals.

Detailed explanation-3: -There are two main categories of reproductive isolation barriers: Prezygotic isolation – occurs before fertilisation can occur (no offspring are produced) Postzygotic isolation – occurs after fertilisation (offspring are either not viable or infertile)