Question

All living things need energy to perform their life processes. How and where do they get the energy that they need?
A.
the production of carbon dioxide through the process of photosynthesis
B.
the fixation of nitrogen gas from the atmosphere
C.
the absorption of light that radiates from the Moon
D.
the oxidation of food through the process of cellular respiration

Answer 1

D. the oxidation of food through the process of cellular respiration.

Explanation: Organisms release energy by oxidizing organic molecules (carbohydrates, fats, proteins) to make ATP. In eukaryotes this occurs mainly in mitochondria (and in the cytoplasm for glycolysis); in prokaryotes it occurs in the cytoplasm and across the plasma membrane.