AP BIOLOGY

Detailed explanation-1: -The ultimate source of all energy is the sun. Plants get the energy to prepare their food from the sun and that is transferred to the whole food chain.

Detailed explanation-2: -The energy of the sun is the original source of most of the energy found on earth. We get solar heat energy from the sun, and sunlight can also be used to produce electricity from solar (photovoltaic) cells. The sun heats the earth’s surface and the Earth heats the air above it, causing wind.

Detailed explanation-3: -Sunlight is essential for photosynthesis. Sunlight provides energy for the reaction between carbon dioxide and water to produce glucose and oxygen. Hence solar energy is considered as the ultimate source of energy.