Question

Arrange the following in the ascending order of there complexity. (least complex at top)

• A. Organ system
• B. Cellular
• C. Organ
• D. Tissue

Answer 1

• All the living organisms are made up of cells and it is the simplest level of organisation.
• When group of cells are specialised to perform a specific function it is called tissue level of organisation.
• Multiple tissue are working together it leads to the formation of an organ.
• When multiple organs work together in co-ordination to form organ system.