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March 16th

chlorophyll

green pigment in plants that absorbs light energy used to carry out photosynthesis

arthropod

invertebrate (animal having no backbone) with jointed legs, e.g., insects

conifer

evergreen, cone-bearing tree

organism

An individual living thing

population

a group of organisms of the same species populating a given area

community

All the different populations that live together in an area

ecosystem

living and nonliving things in an environment, together with their interactions

biosphere

The part of Earth where life exists

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