This is just a few paragraphs and a summary I'd prefer if the sources are cited please. I just have a lot of work and won't have time to finish this project soon. Please help!

What form of anesthetic was used for field surgery

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.

Which is not true about balanced forces?