Which characteristic is not a structural adaptation? A. a porcupine’s spines
B. a spider monkey’s tail
C. geese migrating north
D. an elephant’s wide feet

Which level of consumer had access to the smallest apply of energy

Match the description of each organism to the appropriate category

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.