Q. The branch of science which studies the interactions among organisms and between organisms and physical environment is called as:
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Solution:
The term ecology was given by a German biologist Ernst Haeckel in 1869, which has its origin from the Greek word "Oikos" meaning habitat and logos meaning to study. Organisms on earth are shaped by both biotic and abiotic factors. Ecology is the study of the relationship of living organisms with the abiotic and biotic components of their environment. The study of ecology helps in understanding how organisms interact with other organisms and the physical environment as a group and hence behave like organized wholes, i.e., population, community, ecosystem, or even as the whole biosphere.