JAMB 2015 Biology · Question 25

A group of organisms of the same kind inhabiting the same environment is called

Options

  1. A.ecosystem
  2. B.habitat
  3. C.population
  4. D.species

Answer: C. population

Explanation written with AI and checked against the answer key

Step 1: Analyze the question The question asks for the term for a group of organisms of the same kind living in the same environment. Two key clues: "same kind" and "same environment (area)".

Step 2: Explain the concepts

  • Ecosystem: The community of living organisms (many different kinds) interacting with each other and with the non-living environment (soil, water, air). It includes different species, so it doesn't fit "same kind".
  • Habitat: The place where an organism lives (e.g., a pond or a forest floor). It's a location, not a group of organisms.
  • Population: All the individuals of the same species living together in the same area at the same time (e.g., all the tilapia in a particular fish pond).
  • Species: A group of organisms that can interbreed and produce fertile offspring. This says nothing about being in the same place, as a species can be spread across many regions.

Step 3: Apply to the question

  • "Group of organisms" that are "of the same kind" is a species-level group.
  • "Inhabiting the same environment" narrows it to a particular place. That is exactly what defines a population.

Option D (species) is tempting, but a species is not limited to one environment. Only a population is tied to a specific area.

Step 4: Answer The correct option is C. population.

Tip: Remember the ecological hierarchy from smallest to largest: Individual → Population (same species, same place) → Community (different populations) → Ecosystem (community + environment) → Biosphere.

If you see "same kind + same place," think population.

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