While studying vegetation of an area, terms like 'population' and 'community' are often used. Which one of the following statements best describes a population ?

Asked in UPSC CDS 2 2021 · Topic: Subdivisions of Biology (Ecology)

1. A group of organisms of one species, living in the same area at the same time.
2. A group of organisms of one species living in different areas during different seasons.
3. A unit consisting of biotic and abiotic compon‐ ents.
4. A group of organisms of more than one spe‐ cies, living in the same area at the same time.

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