Question
Unicellular organisms differ from multicellular ones. How?
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Answer
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Unicellular Organisms
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Multicellular Organisms
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The body of the unicellular organism is composed of a single cell.
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The body of the multicellular organism is composed of numerous cells.
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Irregular in shape.
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Have a definite shape.
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Simple body organization.
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Complex body organization.
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A single cell is responsible to carry the life processes.
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Different cells are specialized to perform different functions.
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The total cell body is exposed to the environment.
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Only the outer cells are exposed to the environment.
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Division of labour is at the organelle level.
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Division of labour is at cellular, tissue, organs and organ system level.
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Includes both eukaryotes and prokaryotes.
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Includes only eukaryotes.
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A lifespan of a unicellular organism is usually short.
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These multicellular organisms have a longer lifespan.
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Injury to the cell leads to the death of the organism.
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Injury to a cell does not cause the cell to die in a multicellular organism.
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Reproduce by asexual reproduction.
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Reproduce by sexual reproduction.
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Cell differentiation is absent.
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Cell differentiation is obvious.
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They can be autotrophs or heterotrophs.
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They include both autotrophs and heterotrophs.
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They are microscopic in nature.
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They are macroscopic in nature.
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All forms of bacteria, amoeba, paramecium yeast, are examples of unicellular organisms.
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Human beings, animals, plants, birds, insects, are a few examples of multicellular organisms.
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