Question

food webs
most organisms feed on, and are eaten by, more than one species, so energy flow in nature is more complex than a food chain. birds eat a variety of seeds, fruits, and insects. in turn, they are eaten by snakes, cats, and other birds. the model most often used to represent feeding relationships in an ecosystem is a food web. a food web is a model representing the many interconnected food chains and pathways in which energy flows through a group of organisms.
the figure shows a food web of the feeding relationships in an antarctic community. as in food chains, each level in a food web is called a trophic level. the only autotroph in this particular food web is plantlike plankton. krill and animal - like plankton consume the producers. this is why they are on the next trophic level. after that, the food web becomes more complex. consumers often eat foods from different trophic levels.

1. classify describe how is a food web is different from a food chain.

Explanation:

Food chains are linear, while food webs are networks of multiple feeding relationships. Food webs account for the fact that organisms have multiple food sources and predators.

Answer:

A food chain represents a linear sequence of organisms where each is eaten by the next one in the chain, showing a single - path flow of energy. A food web is a more complex model that consists of multiple interconnected food chains. It shows the many feeding relationships in an ecosystem, where most organisms feed on and are eaten by more than one species, thus representing a more complex and realistic pattern of energy flow.