AP BIOLOGY

Detailed explanation-1: -Law of Conservation of Energy: States that energy cannot be created or destroyed; it can only be transformed. Ten Percent Rule: Only about 10 percent of the energy available in one trophic level is available to organisms in the next trophic level.

Detailed explanation-2: -Food webs illustrate energy flow from primary producers to primary consumers (herbivores), and from primary consumers to secondary consumers (carnivores).

Detailed explanation-3: -Food webs show the flow of energy in an ecosystem by illustrating the way energy flows through food. Producers are organisms that convert light energy to chemical energy in the form of sugar. Each step in the food web represents a transfer of energy from one organism to another.

Detailed explanation-4: -A food chain describes how energy and nutrients move through an ecosystem. At the basic level there are plants that produce the energy, then it moves up to higher-level organisms like herbivores. After that when carnivores eat the herbivores, energy is transferred from one to the other.