Each chromosome contains thousands of genes. What is a gene? Select one:
O
A sequence of DNA that provides the structure for holding the nucleus together
A sequence of DNA that regulates the production of ATP in the cell
A sequence of DNA that codes for a specific protein
A sequence of DNA that regulates the replication of the nucleus

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.