A group of living things that are capable of inter-breeding is called a ____________.

Question

species

niche

community

population

Answer 1

species, but in some cases it doesn't have to be, take a Domestic Dog and a Coyote, they can interbreed but aren't in the same species. Or a Horse and Donkey, but of course their offspring isn't fertile (only sometimes females are)

Answer 2

This a funny question due to the optional answers.

Yes, a species is defined as a groups of living things that are capable of interbreeding, but a population is also a group of species all living within a particular geographic region that are all capable of interbreeding, if they are reproductively mature.

So in a sense, the answer is both species and population.

Answer 3

species

http://en.wikipedia.org/wiki/Species

....A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring....