ECOLOGY
ENERGY FLOW AND THE FOOD CHAIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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multiple food chains
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zero food chains
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ocean food chains
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one food chain
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Detailed explanation-1: -Polar bears are apex predators and occupy the top of the food chain. They are also keystone species, which means that they eat tertiary, secondary, and primary consumers. While they mostly eat seals, they also eat caribou and foxes. On rare occasions, they may also eat fish.
Detailed explanation-2: -There are two types of food chains: the grazing food chain, beginning with autotrophs, and the detrital food chain, beginning with dead organic matter (Smith & Smith 2009).
Detailed explanation-3: -Explain to students that because Alaskan brown bears eat so many different foods-both plants and animals-they are at the top of a complex food web.
Detailed explanation-4: -A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.
Detailed explanation-5: -PRODUCERS: At the bottom of the food chain, plants are natural producers and provide food and nutrients to consumers. HERBIVORES: Herbivores nourish on plants and insects. PREDATORS: Predators prey on herbivores or other predators. DECOMPOSERS: When an animal dies, scavengers and decomposers break them down.