Why does the fact that Americans are using less fertilizer not indicate a decline in American farming? Americans never used much fertilizer.
O Fertilizer is being exported.
Fertilizer use has gotten more efficient
Other countries are taking over agriculture.

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.