Which hypothesis best explains why, relative to their sizes, a rabbit must eat a greater volume of food than a hippopotamus?
a. rabbits run faster than hippopotamuses.
b. rabbits lose heat more easily due to their relatively larger surface area.
c. rabbits are prey, and therefore require more stored energy.
d. hippopotamuses inhabit only hot climates.
e. hippopotamuses spend significant amounts of time in water.

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.