Question

Cells of multicellular organisms are usually …………
A. Triangular
B. Rectangular
C. Polyhedral
D. None of these

Answer 1

Hint: An organism which has only one cell in their body is called a unicellular organism. The organisms having more than one cell are called multicellular organisms. Multicellular organisms are more efficient because they have division of labour.

Complete Answer:
Cell is the basic fundamental and structural unit of life. All living beings possess cells. Each cell has a nuclear membrane, nucleus, cytoplasm and cell organelles. There are different kinds of cells in the body which in turn perform different functions.

For example, blood cells are found in the blood, there are three types of blood cells: white blood cells ( leukocytes), red blood cells ( erythrocytes) and platelets( thrombocytes). They are biconcave and small in shape so that it can fit in capillaries and help in delivering oxygen.

Nerve cells are elongated in structure because they send messages to the brain from one part of the body to the other. Some erythrocytes are triangular in shape. Plant cells are rectangular in shape because the cell wall is rigid.
An organism possesses different types of cells for different purposes. They all have different shapes but usually multicellular organisms are polyhedral in shape. So that a body can fit in all the cells without damaging the organelles.

The answer to the above given question is option ‘C’ polyhedral.

Note: Cell shapes may change from time to time due to cell division, growth and cell death. The functions of the cells are,
- They provide shape and structure.
- They help in growth of the body via mitosis.
- They help in reproduction.
- They produce energy by producing ATP.