Question 21
Question 21 of 40
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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
7. Human nutrition
7.3. Physical digestion

Describe physical digestion as the breakdown of food into smaller pieces without chemical change to the food molecules

11. Gas exchange in human...
11.1. Gas exchange in humans

Identify in diagrams and images the following parts of the breathing system: lungs, diaphragm, ribs, intercostal muscles, larynx, trachea, bronchi, bronchioles, alveoli and associated capillaries

19. Organisms and their e...
19.2. Food chains and food webs

Describe a food chain as showing the transfer of energy from one organism to the next, beginning with a producer