Wallace's Line
If it existed, it was because it should, but not in the way it existed.
Species
Dinosaurs
Length of time species has existed on earth
species that have existed in a community for a long time is said to have attained stability. :)
One.
mammals
Instinct
Genus
fossels.
DIPTERA That's not a species but a higher division above genus and species.
The primary division of a species is into individual organisms. Each species is made up of multiple individual organisms that share similar characteristics and can interbreed to produce fertile offspring.