Earthworms live and reproduce within the soil. They aerate the soil (add air) and add organic material to it. Other organisms perform similar functions in other environments, but earthworms are good at aerating and adding organic matter to soil. Together these statements best describe an earthworm’s:

A. environment

B. habitat

C. nutrition

D. niche

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.