Question

There are various levels of biological organisation. What is the correct sequence of the increasing complexity?

• A. Macromolecules, cells, tissues, organs, organisms, population, communities and ecosystem, and
  biomes
  
• B. Macromolecules, cells, tissues, organs, population, communities and ecosystems, organisms and
  biomes
  
• C. Macromolecules, cells, tissues, organs, organisms, communities and ecosystems, population and biomes
  
• D. Macromolecules, cells, tissues, organs, organisms, population, biomes and communities, and ecosystems
  

Answer 1

The correct option is A Macromolecules, cells, tissues, organs, organisms, population, communities and ecosystem, and

biomes

Levels of organisation

The levels of organisation with increasing level of complexity is as follows:

Macromolecules: Macromolecules are large molecular weight molecules composed of repetitive units of monomers.

Macromolecules like proteins, carbohydrates, lipids, nucleic acids aggregate in a cell to perform specific functions.

Cells: Cell is the basic structural and functional unit of life. All living organisms are composed of cells in their body.

Tissues: The cells structurally similar and performing a similar function constitutes tissue.

Organs: Different tissues coordinate together to form an organ which performs a specific function.

Organisms: Organs work in a coordinated manner and constitute an organism.

Species: A group of organisms that have similar characteristics and can naturally interbreed to produce fertile offspring constitute 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 area form communities.

Ecosystem: Different biotic or living communities interact with each other and 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.

Final answer
(a) Macromolecules, cells, tissues, organs, organisms, population, communities and ecosystem, and biomes