AP BIOLOGY

Detailed explanation-1: -A food web is more complex and is a whole system of connected food chains. In a food web, organisms are placed into different trophic levels. Trophic levels include different categories of organisms such as producers, consumers, and decomposers.

Detailed explanation-2: -A food chain illustrates a simple relationship between producers, primary consumers, secondary consumers, and tertiary consumers, while food webs go far beyond this. Food webs show the relationship between multiple primary, secondary, and tertiary consumers, while food chains show only one direction or chain at a time.

Detailed explanation-3: -Animals may eat more than one type of food. They may eat many different types of plants or many different animals. This makes everything more complicated and the food chain becomes a food web.

Detailed explanation-4: -The flow of energy in a food web is always unidirectional. In a food web, the supplies of food never end. Therefore, it is more stable than the food chain.