An organism is discovered that thrives in both the presence and absence of oxygen.Curiously,the consumption of sugar increases as oxygen is removed from the organism's environment,even though the organism does not gain much weight.This organism
A)is photosynthetic.
B)is a normal member of the animal kingdom.
C)must utilize a molecule other than oxygen to accept electrons from the electron transport chain.
D)is a facultative anaerobe.
E)is an obligate anaerobe.

Question

Quizplus · Accepted Answer

A organism that can thrive in both the presence and absence of oxygen is classified as a facultative anaerobe. The fact that the consumption of sugar increases as oxygen is removed from the organism's environment suggests that it is utilizing fermentation as an alternative pathway for ATP production in the absence of oxygen. This is a characteristic of facultative anaerobes.

An Organism Is Discovered That Thrives in Both the Presence