Cambridge AS & A Level Biology
17.1Variation
Variation in Cambridge AS & A Level Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic44 practice questions2 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 17.1.1Explain, with examples, that variation has genetic, environmental or combined causes.
- 17.1.2Explain discontinuous and continuous variation.
- 17.1.3Explain the genetic basis of discontinuous and continuous variation.
- 17.1.4Use the t-test (formula provided) to compare the means of two samples.
Lessons
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Comparing two means with the t-test
40 min
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Variation: genes, environment and the two types of variation
35 min
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Sample question
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