Compare/contrast under nutrition to malnutrition

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. once a virus gains entry into the body, it invades a host cell in order to? a. synthesize antibodies for defense b. deactivate the host cell's defenses c. access cell processes for reproduction d. metabolize host proteins and grow