Question

Which of the following occupies the highest level in the hierarchy of organisation in multicellular organisms?

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

Answer 1

The correct option is D Organ system

• In multi-cellular organisms, there are various levels of organization within them. This ranges from the simplest to the complex ones.
• While the cells are the basic unit of structure and function in living things and form the 1st level.
• Similar types of cells together form a tissue that forms the 2nd level of organization.
• Organs are made of up tissues and perform a specific function, thus they form the 3rd level of organization.
• Many organs together form an organ system which is the highest among these is the organ system.
• Hence, the correct option is D.