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  1. Study of inter-relationships between organisms and their environment is
    1. ecology
    2. ecosystem
    3. phyto-geography
    4. ethology
Correct Option: A

German biologist Ernst Haeckel coined the term 'ecology', the study of interrelationship between organisms and their environment. Ecosystem, consist of different communities of organism and the physical environment with which they interact. Phytogeography is the study of geographic distribution of plants species on earth.



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