What is an estuary? A. A very large stream
B. A bog with stagnant water
C. An area where fresh water and salt water mix
D. A biome located below the Arctic Circle

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.