[Campbell Biology P.938] According to the 'Energy Allocation and Use' section, what is the p... | Practice Question
According to the 'Energy Allocation and Use' section, what is the primary difference in how autotrophs and heterotrophs obtain chemical energy?
A: Autotrophs consume other organisms for energy, while heterotrophs produce their own energy from light.
B: Autotrophs harness light energy to build organic molecules, while heterotrophs obtain chemical energy from food containing organic molecules synthesized by other organisms.
C: Autotrophs rely solely on fermentation for ATP production, while heterotrophs use cellular respiration.
D: Autotrophs obtain energy from inorganic molecules, while heterotrophs obtain energy from organic molecules found in soil.
Explanation
The 'Energy Allocation and Use' section states: 'Most autotrophs, such as plants, harness light energy to build energy-rich organic molecules and then use those molecules for fuel. Most heterotrophs, such as animals, obtain their chemical energy from food, which contains organic molecules synthesized by other organisms.'