Which of the Following Statements Concerning Living Phytoplanktonic Organisms Are

Which of the following statements concerning living phytoplanktonic organisms are True?
1) They are important members of communities surrounding deep-sea hydrothermal vents.
2) They are important primary producers in most aquatic food webs.
3) They are important in maintaining oxygen in Earth's seas and atmosphere.
4) They are most often found growing in the sediments of seas and oceans.
5) They can be so concentrated that they affect the color of seawater.

A) 1 and 4
B) 1, 2, and 4
C) 2, 3, and 4
D) 2, 3, and 5
E) 3, 4, and 5

Correct Answer:

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