SAT Subject Biology Practice Question 407: Answer and Explanation
Which of the following is the area of least productivity?
A. Intertidal zone
B. Oceanic zone
C. Photic zone
D. Aphotic zone
E. Neritic zone
Correct Answer: D
D The area of least productivity in the ocean is the area that does not receive any sunlight, so photosynthesis cannot occur. The area without any sunlight is called the aphotic zone.