WHAT IS THE DIFFERENCES BETWEEN UNICELLULAR AND MULTICELLULAR ORGANISMS ?

WHAT IS THE DIFFERENCES BETWEEN UNICELLULAR AND MULTICELLULAR ORGANISMS ?

Most important and fundamental level in the organisation of living world is the cellular level. Cells are the fundamental structural and functional unit of living organisms and are the basic unit of life.
Cell biology is the study of cells in all aspects of structure and functions.

1. Unicellular organisms

1. An unicellular organism is represented by a single cell.
2. All activities of the organisms are performed by a single cell.
3. There is no division of labour as the single cell perform all life activities.
4. Reproduction consumes a single cell.
5.  The life span of an individual is short.

2. Multicellular organisms

1. A multicellular organism consists of large number of cells.
2. A single cell performs one or few activities of the organisms.
3. Cells are specialized to perform different functions of the body so that there is a division of labour within cells.
4. Only some cells of the body called germ cells take part in reproduction. Other cells "somatic cells" remain instact.
5. The life span of an individual is long.

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