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

Question

Quizplus · Accepted Answer

Phytoplankton are crucial primary producers in aquatic food webs (2), they contribute significantly to oxygen production (3), and can be so abundant that they change the color of seawater (5). They are not typically found in deep-sea hydrothermal vent communities or in sediments.

Which of the Following Statements Concerning Living Phytoplanktonic Organisms Are