Answer: [D]: "oceans" .
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Note: Among the answer choices given—{aquifers, glaciers, lakes, oceans}—oceans are the saltiest (VERY salty—requiring "desalination" in order to obtain potable water.
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Plant cells can be 3 to 10 times larger than animal cells. An estimate would be between 3 and 10 animal cells squeezing inside a plant cell.
Answer:
DNA is made up of molecules called nucleotides.
Explanation:
They function as a messaging system
Answer:
When Earth passes directly between the sun and the moon, a lunar eclipse takes place. During a solar eclipse, the moon casts two shadows. One is called the umbra; the other is called the penumbra. An eclipse takes place when Earth or the moon passes through a shadow.
Explanation:
