Does the weasel have a nucleus?

Answer 1

No, weasels do not have a main nucleus, but their cells do.

The weasel is an animal, therefore, it is a multicellular organism. All multi cellular organisms are composed of eukaryotic cells (as opposed to prokaryotic cells). Each eukaryotic cell contains its own nucleus. So the weasel itself does not have a nucleus, but its cells do. The equivalent to a nucleus in an animal's organ systems would probably be the brain. Both the nucleus and the brain are like the "command center."