Members that can interbreed and produce fertile offspring are usually in the same species. This is because a species is defined as a group of organisms that can interbreed and produce viable offspring. The ability to produce fertile offspring signifies a higher level of relatedness and genetic compatibility between individuals.
When the two populations can no longer interbreed.
No, many other animals can interbreed.
No, rattlesnakes and rat snakes cannot interbreed.
When a group of organisms can interbreed they are considered a species. Humans can interbreed and produce other humans because they are the same species.
Organisms that can interbreed are found at the species level.
Of course they do! How would the zebra species still be 'alive' if the adult zebras didn't have baby zebras. Of course they have babies.
Zebras reproduce sexually, so zebras do have fathers.
No.
No, rattlesnakes and rat snakes cannot interbreed.
Zebras are prey. Several other animals eat zebras, but zebras don't eat other animals.
No, there are no zebras in Wyoming. (Zebras are native to the African continent.)