<span>Why are phytoplankton are essential ??
As they form the basis of the marine food chain. <span>Phytoplankton is the main food source for everything from microscopic organisms to whales.</span></span>
At least 60 minutes a day
Answer:
Over-the-counter (OTC) drugs are those available without a prescription. OTC drugs enable people to relieve many annoying symptoms and to cure some diseases simply and without the cost of seeing a doctor. However, safe use of these drugs requires knowledge, common sense, and responsibility.
Explanation:
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