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Chapter 2: Ecosystems

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Across
4.the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem
6.the exchange of oxygen and carbon dioxide between living cells and their environment
8.a community of organisms and their abiotic environment
12.the movement of carbon from the nonliving environment into living things and back
13.the average weather conditions in an area over a long period of time
15.an ecosystem responds to change in order to obtain this
16.a group of various species that live in teh same habitat and interact with each other
17.an organism that eats other organisms or organic matter instead of producing its own nutrients
Down
1.a large region characterized by a specific type of climate and certain types of plant and animal communities
2.the cycling of nitrogen between organisms, soil, water, and the atmosphere
3.plants, provide the basic food source in an ecosystem
5.a place where an organism usually lives
7.Meat eaters
9.the replacement of one type of community by another at a single location over a period of time
10.plant-eaters
11.an organism that feeds by breaking down organic matter from dead organisms
14.Eats both plants and animals

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