AP BIOLOGY

Detailed explanation-1: -The bottom and largest level of the pyramid is the producers and contains the largest amount of energy. As you move up the pyramid, through the trophic levels to primary, secondary and tertiary consumers, the amount of energy decreases and the levels become smaller.

Detailed explanation-2: -The first trophic level of the food chain has the most energy. This level contains the producers, which are all of the photosynthetic organisms. This includes plants and sometimes photosynthetic bacteria and protists. These organisms take energy from the sun and turn it into organic sugar.

Detailed explanation-3: -Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

Detailed explanation-4: -The plants use 90% of the energy that they get from the sun to fuel the plants own life processes. Consumers then can be said to get their energy indirectly from the sun but receive only 10% of the energy level of the producers.