The ultimate source of all energy in a terrestrial ecosystem is
A) the organic matter in all the organisms of the ecosystem.
B) electrons from water molecules.
C) sunlight.
D) ATP.
E) inorganic mineral ions in the soil.

Question

Quizplus · Accepted Answer

Sunlight is the ultimate source of energy in a terrestrial ecosystem. This energy is converted into organic matter through photosynthesis by autotrophic organisms, which is then used as a source of energy by heterotrophic organisms in the food chain.

The Ultimate Source of All Energy in a Terrestrial Ecosystem