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Animals and Ecosystems behavioral adaptation -- a certain type of activity organisms perform which helps them meet a life need (Some birds fly south for the winter.) carnivore -- an animal that eats only meat community -- all of the populations living in the same place at the same time consumer -- a living thing that depends on producers for food decomposer -- an organism that breaks down dead plants and animals ecosystem -- a community and its nonliving environment endangered species -- an organism in danger of becoming extinct (gone forever) extinct -- the condition in which there are no more living members of a species food chain -- the path of food energy from the sun, to producer, to consumer food web -- the flow of energy from the sun through producers, consumers, and decomposers habitat -- the place or kind of place in which an animal or plant naturally lives herbivore -- an animal that eats only plants hibernation -- a behavioral adaptation where animals go into a deep sleep and body systems reduce to minimal levels instinct -- a behavior an organism does not have to learn; present at birth life cycle -- the stages of growth and change for an organism metamorphosis -- the changing of certain organisms from one stage to another during its life cycle migration -- a behavioral adaptation where there is a seasonal movement of animals from one place to another niche -- the function that an organism performs in the food web of that community omnivore -- an animal that eats both plants and animals Animals and Ecosystems predator -- an animal that hunts and eats other animals prey -- an animal hunted and eaten by other animals population -- all of the organisms of the same kind that are living in the same area at the same time producer -- a living organism that uses sunlight to make sugar structural adaptation -- a physical attribute that helps organisms meet a life need (A chameleon changes color to blend into its surroundings.)