AP BIOLOGY

Detailed explanation-1: -All of the interconnected and overlapping food chains in an ecosystem make up a food web. Organisms in food webs are grouped into categories called trophic levels. Roughly speaking, these levels are divided into producers (first trophic level), consumers, and decomposers (last trophic level).

Detailed explanation-2: -Food web and food chain are made up of different trophic levels. Q. Assertion: A network of interconnected food chains in an ecosystem is known as a food web.

Detailed explanation-3: -Energy Flow in Ecosystems. In every ecosystem, organisms are linked through feeding relationships. There are a great many feeding relationships in any ecosystem, but energy always flows from primary producers to various consumers. These feeding relationships are represented by food chains and food webs.

Detailed explanation-4: -A food web is made up of interconnected food chains. Most communities include various populations of producer organisms which are eaten by any number of consumer populations. The green crab, for example, is a consumer as well as a decomposer.

Detailed explanation-5: -Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems.