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Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
13. Excretion in humans
13.1. Excretion in humans

State that carbon dioxide is excreted through the lungs

12. Respiration
12.1. Respiration

State the uses of energy in living organisms, including: muscle contraction, protein synthesis, cell division, active transport, growth, the passage of nerve impulses and the maintenance of a constant body temperature

12. Respiration
12.2. Aerobic respiration

State the word equation for aerobic respiration as: glucose + oxygen → carbon dioxide + water