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State the eight characteristics shared by all living organisms?
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nutrition; respiration; excretion; sensitivity/response to surroundings; movement; homeostasis/control of internal conditions; reproduction; growth and development (award 1 mark per two correct characteristics)
Explain why a car is not considered a living organism, even though it moves and uses fuel?
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a car does not carry out all eight life processes; for example it cannot reproduce / it does not grow / it does not excrete metabolic waste
Distinguish between excretion and egestion?
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excretion is the removal of waste products produced by metabolic reactions in cells; egestion is the removal of undigested food material that has not been absorbed into the body
Suggest why viruses are not classified as living organisms?
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viruses cannot reproduce on their own / they need a host cell to replicate; they do not carry out respiration / they do not grow