D) one direction
HEART VALVES OPEN TO MOVE BLOOD ONLY IN ONE DIERECTION WHICH IS FORWARD DIRECTION BLOOD NEVER FLOW BACKWARD INSIDE HEART.
Because when a bacteria mutate it could make a new diseases and viruses and cause a whole pandemic
Answer:
Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts).
Explanation:
Answer:
the answer is true
Explanation: i got it right on edge.