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biological weapon
biology
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biome

bi·ome [ bm ] (plural bi·omes)


noun 
Definition:
 
major ecological community: a division of the world's vegetation that corresponds to a defined climate and is characterized by specific types of plants and animals, e.g. tropical rain forest or desert. The world's lakes and oceans may also be considered biomes, although they are less susceptible to climatic influences than terrestrial biomes.

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