AP BIOLOGY

Detailed explanation-1: -An energy pyramid is a model that shows the flow of energy from one trophic, or feeding, level to the next in an ecosystem. The model is a diagram that compares the energy used by organisms at each trophic level. The energy in an energy pyramid is measured in units of kilocalories (kcal).

Detailed explanation-2: -On average, only about 10% of the energy stored as biomass in one trophic level-e.g., primary producers-gets stored as biomass in the next trophic level-e.g., primary consumers. Put another way, net productivity usually drops by a factor of ten from one trophic level to the next.

Detailed explanation-3: -Arrows on a food chain, or food web, represent the flow of energy. The placement of the arrows in a food chain or food web is very important. The arrows always show the direction of the energy as it is transferred from one organism to another. The flow of energy can also be represented within an energy pyramid.

Detailed explanation-4: -An energy pyramid (sometimes called a trophic pyramid or an ecological pyramid) is a graphical representation, showing the flow of energy at each trophic level in an ecosystem. The base of the energy pyramid indicates the energy available within primary producers.

Detailed explanation-5: -An energy pyramid is a diagram that shows the flow and quantification of energy transfer in an ecosystem. Energy pyramids are based on the trophic levels of a food web in an ecosystem. The main trophic levels are: Producers: organisms that make their own food. Primary consumers: Organisms that eat producers.