Which of the following genotypes is a purebred?
Rr
Bb
bb

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

This is a type pf behavior that animals are born with and them to survive

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.