Best description of Christianity

[Esquilax]

so what ever two "canines" he took aboard the Ark are the ancestors of all the canines we have today, the animals that he didn't take went extinct.

I believe animals can evolve within their group, I don't believe however, that all creatures evolved from the same ancestor.

Except that we know, just off the top of my head here, that whales evolved from early land-dwelling ungulate animals; the morphological and genetic data confirm this. So, are whales just a part of the cow "group," of animals now? Are the definitions of what goes into which group of animals going to change each time science discovers something new, or are you going to present a clear and unambiguous list of what determines these groups before we continue the discussion, so we can be sure you aren't just making this up as you go along?

For that matter, why was god using human-defined family classifications when he was populating the Ark? Did Noah know about this, even though the classifications wouldn't be defined for many years afterward?