There are five levels of cell organization recognized by biologists.
I think it is repeatable, testable, observable
<span>Animalia -</span><span> Mammals, amphibians, reptiles, birds, fish, mollusks, and insects
are all included in this kingdom.</span>
There is only species of a koala but you can ask how many races there are.
The name is, "phascolarctos cinereus".<span />
