Arrange the following levels of ecological organisation from the smallest to the largest:
1. Community
2. Biosphere
3. Population
4. Organism
5. Ecosystem
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 4, 3, 1, 5, 2
Each level contains the one before it, from the smallest to the largest:
4. Organism — A single living being.
3. Population — All the organisms of one species living in an area form a population.
1. Community — The populations of different species living together form a community.
5. Ecosystem — A community together with its non-living surroundings (air, water, soil) forms an ecosystem.
2. Biosphere — All the ecosystems of the Earth together make up the biosphere, the largest level.