Besides supporting and protecting a cell, the cell membrane __ what enters and leaves the cell? ?

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half

Number and variety of living organisms includes genetic, species, and ecological types

Which animal is a producer in this ecosystem