Ecology: The term ecology is derived from the Greek word okios meaning household and Logus meaning study. This is the study of interactions of organisms with their physical environment and with each other.
It is a branch of ecology that studies plant and animal relationships with their surroundings.
Environment: This refers to all the factors acting on an organism. OR the surroundings of an organism.
Community: This is an association of plants and animals living together and affecting each other’s lives and distinguishable from other such associations.
Biosphere: This is the part of the earth in which life exists. It stretches from 12-17km above the surface of the earth and about the same distance into the depth of the sea.
Lithosphere: This is the solid crust of the earth.
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