"a specific kind of something" and "(biology) taxonomic group whose members can interbreed"
A fundamental category of taxonomic classification, ranking below a genus or subgenus and consisting of related organisms capable of interbreeding.
a plant or animal that was transported from its original habitat to a new one
a species introduced with other species
Eventually, all native species had to have been introduced sometime. So, native species are introduced species that have been in the ecosystem for a long time, and it and the other organisms have...