4. Why was Wegener's theory of continental drift almost completely discarded? 1)It didn't explain how mountains formed.

2)It didn't explain how continents fit together.

3)It didn't have a mechanism for how drift occurred.

4)It wasn't supported by fossil evidence.

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.