Eutrophication is the enrichment of an ecosystem with chemical nutrients, typically compounds containing nitrogen, phosphorus, or both.
Eutrophication can be a natural process in lakes, occurring as they age through geological time.
Eutrophication was recognized as a pollution problem in European and North American lakes and reservoirs in the mid-20th century.
Human activities can accelerate the rate at which nutrients enter ecosystems.
Enzymes<span> are protein molecules that are manufactured by all plant and animal cells. All cells require </span>enzymes<span> to survive and </span>function<span>. </span>Enzymes<span> are catalysts, which means that they make chemical reactions go faster, but are not changed by the reaction.</span>
Answer:
They both have mountains and steep canyons
Explanation:
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Answer:
D.Both systems control movement
Explanation:
Skeletal protect the organs and hold up the body to move and the muscular system is for controlling movement.
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