78. What color pigmentation is associated with pregnancy mask? brown
blue
b. yellow
d. red

What do heterotrophic cells need to survive?

How do you transfer mrna into codons ? i'm so confused : (

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