Question 39
Question 39 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
17. Inheritance
17.3. Inheritance

Understand that ionising radiation and some chemicals increase the rate of mutation

17. Inheritance
17.4. Selection

Describe natural selection with reference to: (a) variation within populations (b) production of many offspring (c) struggle for survival, including competition for resources (d) reproduction by individuals that are better adapted to the environment than others (e) passing on of their alleles to the next generation

17. Inheritance
17.1. Variation

Understand that discontinuous variation is usually caused by genes only and continuous variation is caused by genes and the environment