The presence of cholesterol in the plasma membranes of some animal cells... A:Makes a membrane less flexible allowing more pressure from within the cell
B:Enable membranes to stay fluid more easily when cell temperatures drop.
C:Makes an animal more susceptible to heart disease.

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.