AP BIOLOGY

Detailed explanation-1: -Any of the factors that prevent potentially fertile individuals from meeting will reproductively isolate the members of distinct species. The types of barriers that can cause this isolation include: different habitats, physical barriers, and a difference in the time of sexual maturity or flowering.

Detailed explanation-2: -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)

Detailed explanation-3: -In essence, different populations find different genetic solutions to the same selective problem. In turn, the different genetic solutions (i.e., mutations) are incompatible with one another, causing reproductive isolation.

Detailed explanation-4: -Reproductive isolation can be either prezygotic (barriers that prevent fertilization ) or postzygotic (barriers that occur after zygote formation such as organisms that die as embryos or those that are born sterile).