Which of the following obtain energy by oxidizing inorganic substances-energy that is used, in part, to fix CO₂?
A) photoautotrophs
B) photoheterotrophs
C) chemoautotrophs
D) chemoheterotrophs that perform decomposition
E) parasitic chemoheterotrophs

Question

Quizplus · Accepted Answer

Chemoautotrophs obtain energy by oxidizing inorganic substances and use it to fix CO₂. They do not rely on light for energy, hence they are not photoautotrophs or photoheterotrophs. Chemoheterotrophs can obtain energy by decomposing organic substances but they cannot fix CO₂, so D and E are incorrect.

Which of the Following Obtain Energy by Oxidizing Inorganic Substances-Energy