Why does the cell need both mrna and trna in order to synthesize a protein like hemoglobin?

Which organelle plays a role in intracellular digestion?

Match the following terms and definitions. the transformation of a larva to an adult; occurs only in animals having great differences in form between the larva and adult pupa 2. type of mammal that lays eggs monotreme nymph the part of certain insect life cycles in which the young animal has no wings or reproductive organs the developmental stage between larva and adult in insects undergoing metamorphosis metamorphosis 5. the male gonad which produces sperm testes

Which elements are in the substance that makes up about 60% of the male human body