Question 1
Which of these is an example of excretion?
- A dog passing faeces
- Removal of urea in urine
- Taking glucose into a cell
- Release of enzymes into the gut
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Answer: B (1)
Question 2
Define each of these characteristics of living organisms. (a) sensitivity (b) growth (c) excretion (d) nutrition
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- (a) the ability to detect and respond to changes in the internal or external environment (1)
- (b) a permanent increase in size and dry mass (1) reject increase in size alone
- (c) the removal of the waste products of metabolism and substances in excess of requirements (1)
- (d) the taking in of materials for energy, growth and development (1)