Answer:
They are organisms (individual organisms called "plankters") that live in large bodies of water.
Explanation:
They reside in large bodies of water (oceans, lakes, etc). They are usually abundant in surface waters because all ecosystems of plankton live off input of solar energy.
Answer:
increase
Explanation:
because acidity has been increase d
Answer:
sorry i dont know the answer
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Answer:
True. The heart contracts twice per heartbeat. One contraction is the ventricular and the other one is the artrial.
