What's covered
Evolution and natural selection12
Inheritance and variation10
Sample questions
A taste of the 22 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
1Evolution and natural selection
Who proposed the theory of natural selection?
- ✓Charles Darwin
- •Gregor Mendel
- •James Watson
- •Louis Pasteur
2Inheritance and variation
What is a gene?
- •A type of red blood cell
- •Group of organelles in a cell
- •Pair of chromosomes joined together
- ✓Section of DNA that codes for a feature
3Evolution and natural selection
What does natural selection state?
- ✓Best-adapted individuals survive and reproduce
- •Healthiest individuals avoid all illness fully
- •Largest animals dominate their habitats easily
- •Strongest individuals always win every fight
4Inheritance and variation
Which chromosomes determine male sex in humans?
- •XX
- ✓XY
- •YY
- •ZW
5Evolution and natural selection
What evidence supports evolution?
- •Animals living in same habitats
- ✓Fossils, anatomy, DNA comparisons
- •Plants and animals having same lifespan
- •Sharing food preferences across species
6Inheritance and variation
What is genetic variation?
- •Differences caused by learning
- •Differences caused only by climate
- •Differences in body size only
- ✓Differences in DNA between individuals
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