Virtually All Life on Earth Depends on Energy ULTIMATELY From

Question

Virtually all life on earth depends on energy ULTIMATELY from:
A) the power company.
B) batteries.
C) the green-house effect.
D) the sun.
E) activation energy.

Accepted Answer

The sun provides the ultimate source of energy for almost all living organisms on earth. Photosynthetic organisms such as plants, algae, and some bacteria use sunlight to convert carbon dioxide and water into organic compounds that can be used as food by themselves and by other organisms in the food chain. Non-photosynthetic organisms obtain energy by consuming other organisms that have produced organic compounds through photosynthesis. Therefore, the ultimate source of energy for all life on earth can be traced back to the sun.