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.

Question

Quizplus · Accepted Answer

Light penetration decreases with depth in the oceans, which affects the amount of photosynthesis that can occur. Different types of organisms have adapted to different light levels, leading to distinct life zones in the ocean based on depth.

The Oceans Can Be Divided into Life Zones Even Though