Question

Biotic community along with its interacting physical environment comprise
A. Phytosociology
B. Phytogeography
C. Ecosystem
D. Ecology

Answer 1

Hint: It is a functional unit of nature. It comprises all the biotic and abiotic components. The biotic components include all the living organisms whereas abiotic components that the physical environments include water, light, air, land, etc. Both the components (biotic and abiotic) are interdependent to each other.

Complete answer:
A. Phytosociology is a branch of ecology that deals with the study of plants. It especially covers the structure, composition and interrelationships with the plant species.
B. Phytogeography is a branch of botany that studies the geographical distribution of plants.
C. Ecosystem is a functional unit of nature where biotic components interact among themselves and also with abiotic components in a particular area. For example a forest, small pond, etc.
D. Ecology is a study of the relationship and interaction between biotic components among themselves and with their physical environment. In simple words, ecology is a study of an ecosystem.
From the above definition of different terms, we can say the Biotic community along with its interacting physical environment comprise the ecosystem.

Therefore the correct answer is option C.

Note: An ecosystem is divided into two that is a terrestrial ecosystem like a forest, desert, etc and aquatic ecosystems like a pond, sea, etc. An ecosystem can be natural or man-made. Each ecosystem has characteristic physical structure resulting from the interaction between biotic components and abiotic components. Stratification and Species composition are the two main structural features of an ecosystem.