Help QUICKK With all 4 questions plzz

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.

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture

All other things being equal the size of a population will decrease if