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B
E.P. Odum
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C
Carl Mobius
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D
Earnst Haeckel
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Solution
The correct option is A A.G.Tensely An ecosystem may be defined as a structural and functional unit of biosphere, comprising living organisms and their non-living environment that interact by means of food chains and chemical cycles resulting in the energy flow , biotic diversity and material cycling to form a stable, self-supporting system. The term ecosystem was introduced by Tansley in 1935.
E. P. Odum was an American biologist who brought the ecosystems ecology into the main stream and is also known as the father of modern ecology. He is known for his pioneering work on ecosystems ecology.
Mobius was a German zoologist who was a pioneer in the field of ecology.
Ernst Haeckel was a biologist and naturalist who is credited with the discovery, description and naming of thousands of species.