No, it's only for the group of organisms and related. (ex. Felidae=for all cats)
Species
A group of the same species in a particular geographic region is generally called a population.
Endangered species
endangered species
endangered species
an endangered species
A Species
One kind of organism is a species.
This would make it an endangered species.
A population in a community means the specific kind of organism (plants and animals) living in a community (all the living things in an ecosystem)
No, not every gene is transferable. It takes a bit of knowledge about what a particular gene codes for, and where it would correspond in the second organism.
There are hundreds of thousands of species living today.