Question

The living organisms on or around the earth constitute-
A.Biome
B.Biosphere
C.Community
D.Biocoenosis

Answer 1

Hint: All the plants and animals in any area are dependent on each other and interrelated to each other in their physical environment. This group of living organisms forms an ecosystem as they live and interact with each other in a specific environment. An ecosystem contains both biotic and abiotic factors.

Complete Step-by-Step Solution:
A biome is a large ecosystem that has distinct vegetation and animal life. It is a community of plants and animals with similar life forms and environmental conditions. There are five major biomes namely- aquatic, grassland, forest, desert, and tundra.
The biosphere is the portion of the earth where life exists. It contains an atmosphere, lithosphere, and hydrosphere. All the living organisms on and around earth constitute the biosphere. It is the sum of all the ecosystems where living organisms interact with each other.
A community is a group of living organisms living in the same area or sharing an environment. It can be a community of people or plants and animals.
Biocoenosis is the term that describes the interaction of living organisms together in a habitat. It was first coined in $1877$ by Karl Mobius.

Answer- Hence the correct answer is B.

Note: The study of the ecosystem is called ecology. The ecosystem is the functional unit of ecology. It can be as big as an ocean or as small as an oasis. There are mainly two types of an ecosystem-
1.The terrestrial ecosystem is an ecosystem that is based on land. It can be named according to the type of zone in which it is present like- forest ecosystem, grassland ecosystem, tundra ecosystem or desert ecosystem.
2.An aquatic ecosystem is an ecosystem that is present in the water-bodies. It is of two types- the freshwater ecosystem and the marine ecosystem.