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What is 1 + 3?
a living thing such as a plant or animal
a group of similar individuals living in the same geographic area
a group of organisms that can mate and produce offspring like themselves
something that can make its own food
things that breakdown material and dead organisms
something that uses something else to get food and energy
organisms that eat only plants and plant products
animals that eat other animals
a group of things that live and work together in the same environment
animals that eat both plants and animals
environment that meets and organisms needs
populations that live in the same place at the same time