| Date | November 2013 | Marks available | 1 | Reference code | 13N.1.SL.TZ0.20 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 20 | Adapted from | N/A |
Question
What causes heritable variation in a species?
I. Muscle development through exercise
II. Increased rainfall in the ecosystem
III. Changes in the genome of the species
A. I and III only
B. II only
C. III only
D. I, II and III
Markscheme
C
Examiners report
[N/A]
Syllabus sections
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