1 the struggle between the organisms of an ecosystem to obtain the resources needed for survival
2 a biome characterized by extremely dry conditions, usually sandy with little to no vegetation
3 the ability of an organism to change in response to its environmental surroundings in order to survive
4 a term used to describe land or soil that is permanently frozen thus unable to support vegetation growth
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5. the coldest biome on earth, characterized by no trees, a layer of permafrost under the top layer of soil, and low precipitation
6. one of the most biologically diverse biomes, characterized by standing water such as marshes, bogs, and swamps; high precipitation; and usually humid conditions
7. the term used to refer to moisture that falls to the earth's surface in the form of rain, snow, or sleet
8. the line that divides the earth into two equal parts, the northern hemisphere and southern hemisphere, and over the course of a year receives the most amount of heat from the sun causing seasonal changes in weather to be less dramatic and almost non-exist
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