C It controls what is allowed to enter or leave the cell.
During digestion, your pancreas makes pancreatic juices called enzymes. These enzymes break down sugars, fats, and starches. Your pancreas also helps your digestive system by making hormones. These are chemical messengers that travel through your blood.
You did not post the tree, but I would guess it would be Species 3 is most closely related to species 4.
C. Amino Acid , hope this helps
