Imagine that you discover a carnivorous deep-sea fish that cannot utilize the carbon in carbonic acid (or any other inorganic molecule) present in seawater to form glucose (or other organic molecules). Living so far beneath the water's surface, this fish is also incapable of harnessing energy from the sun. This fish would be considered a:
A)phototroph.
B)photoautotroph.
C)photoheterotroph.
D)chemoautotroph.
E)chemoheterotroph.

Question

Quizplus · Accepted Answer

This fish is a chemoheterotroph because it obtains energy by consuming organic molecules made by other organisms, rather than by using sunlight (photo-) or inorganic molecules (autotroph). It cannot fix carbon from inorganic sources and relies on consuming other organisms for its energy and carbon needs.

Imagine That You Discover a Carnivorous Deep-Sea Fish That Cannot