What enzyme brings in the complimentary dna strand and proofreads it to make sure it is an exact compy

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16

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 organ controls breathing? lungs alveoli heart diaphragm