Which of the following forms the highest level of organisation?
A
Organ
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B
Cell
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C
Tissue
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D
Organ system
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Solution
The correct option is D Organ system
The cell is the smallest structural and functional unit of life.
A group of cells with similar functions and common origin forms the tissue. A collection of tissues forms the organ and performs a similar function. An organ system is a group of organs that work together to perform one or more functions.
Thus, the highest level of organization is the organ system.