During transcription, enzymes bind to a molecule of dna.
then, the enzymes unwind and separate the dna's double helical strands. as the molecule unwinds, complementary nucleotides pair with one of the dna strands to form

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.