To be considered a species, an organism must be able to interbreed and produce viable offspring with other members of the same species. Additionally, they must be reproductively isolated from other species, meaning they do not interbreed with organisms from different species.
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.
Probably, considering that both are dogs. All dogs are part of the same species, meaning that, whatever their differences in looks, they can interbreed.
No.
No, rattlesnakes and rat snakes cannot interbreed.
No.
hybrids are produced when two different species interbreed
The taxon that includes only organisms that can successfully interbreed is species. Members of the same species are capable of producing fertile offspring through interbreeding.