LIFE SCIENCE

Detailed explanation-1: -Reproductive isolation is the inability of two populations to interbreed with one another. There are two different types of barriers that prevent the members of two different species from mating, to producing offspring, or having fertile offspring: prezygotic barriers and postzygotic barriers.

Detailed explanation-2: -In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction.

Detailed explanation-3: -Allopatric speciation (1) occurs when a species separates into two separate groups which are isolated from one another. A physical barrier, such as a mountain range or a waterway, makes it impossible for them to breed with one another.

Detailed explanation-4: -Allopatric speciation is a type of speciation in which biological populations are physically isolated by an extrinsic barrier and evolve intrinsic (genetic) reproductive isolation, such that if the barrier breaks down, individuals of the population can no longer interbreed.

Detailed explanation-5: -Species are kept distinct from one another by prezygotic and postzygotic barriers. These barriers keep organisms of different species from mating to produce fertile offspring, acting before and after the formation of a zygote, respectively. These barriers maintain the reproductive isolation of species.