explain why crossing-over is an important source of genetic variation. detailed response please, i really need help with this one

Why is it important that fibrin is insoluble in water?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

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.