If two animals are in the same class what must they also be in?

If two animals are in the same class, they must also be in the same phylum.

Here's why:

* Kingdom: The broadest category.

* Phylum: A major division within a kingdom.

* Class: A subdivision within a phylum.

* Order: A subdivision within a class.

* Family: A subdivision within an order.

* Genus: A subdivision within a family.

* Species: The most specific category.

Think of it like a hierarchy - you can't be in the same class unless you're also in the same phylum!