Question

Which one has the correct sequence of increasing organisational complexity?

• A. Species, Variety, Ecosystem and Population
• B. Population, Community, Species and Ecosystem
• C. Population, Variety, Community and Ecosystem
• D. Population, Community, Ecosystem and Biome

Answer 1

The correct option is D Population, Community, Ecosystem and Biome

Level of organisation

The different levels of organisation with increasing levels of complexity are:

Species: A group of organisms that can naturally interbreed among themselves to produce fertile offsprings form a species.

Population: Group of organisms of the same species occupying a particular geographic area forms a population.

Communities: Number of populations of different species interacting together in a specific geographical location form communities.

Ecosystem: Different biotic or living communities interact with each other along with their abiotic surroundings to form the ecosystem.

Biome: Different ecosystems in a geographical area together form a specific biome. It is the highest and most complex level of organisation.

As we go up the organisational level the complexity increases as follows:
$\text{population}\to \text{Community}\to \text{Ecosystem}\to \text{Biome}$

Final answer:
(a) Population, Community, Ecosystem and Biome