The Oceans Can Be Divided into Life Zones Even Though

question 147

Multiple Choice

The oceans can be divided into life zones even though they are all connected because

• A) the rate of photosynthesis is low in the oceans.
• B) ocean currents keep organisms close to where they were born.
• C) light penetration, and hence photosynthesis, vary with depth and determine where organisms live.
• D) trade winds keep warm and cold waters separate.
• E) continents provide barriers to movement of planktonic life forms.

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