Do animal cells have a nucleus ?

Yes, animal cells do have a nucleus. If you were to look at the cell structure of an animal, you would see that they do indeed have a nucleus, with somewhat small vacuoles and other cell parts that humans and plants have. Animals do not have cell walls or chloroplasts like plants because they don't need those structures to function.

#teamtrees #WAP (Water And Plant)

human didn't come from monkeys man i hate these stupid teachers

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.