A chromosome consist _of held together by _

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

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.

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from