I’m taking this test right now please help!

How many chromosomes are in a gold fish?

According to the cladogram, which organisms have roundworms as a common ancestor?

Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.