The factors in a controlled experiment that remain the same such as same size pot, same amount of water, same kind of plant, etc are called the A. Constants B. Variables C. Procedures D. Data

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.

Describe the function of the endomembrane system? what organelles are involved?

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.