The sun and the planets are located in our solar system. are outside of the solar system

How can you keep track of variables in a science experiment?

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.

What substance acts to prevent sudden ph changes in bodily fluids?