CLASS 10 BIOLOGY CHAPTER CELL, Cheat Sheet of Biology

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Table 2.1. Differences between unicellular and multicellular organisms. Unicellular organisms Multicellular 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. 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 intact. 5. The life span of an individual is long. reservoir condensers Figure 2.1. Robert Hooke’s microscope.