The bacteria in our large intestine break down food that we consider waste. during this process, vitamins are released that we absorb into our bloodstream. this is an example of which symbiotic relationship?

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.