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TASBiology

Unit 4: Change Over Time

4 dot points across 4 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

What evidence supports the theory of evolution by natural selection?

Describe and evaluate the lines of evidence that support evolution.
The main lines of evidence for evolution: fossils, comparative anatomy, biogeography, embryology, and molecular and biochemical data, for TCE Biology Unit 4.
7 min answer →

How does natural selection lead to adaptation in populations?

Explain how natural selection acts on variation to produce adaptation over generations.
How natural selection acts on heritable variation, the role of selection pressures, and the structural, physiological, and behavioural adaptations that result, for TCE Biology Unit 4.
7 min answer →

How and why do allele frequencies change within a population over time?

Use the Hardy-Weinberg principle and describe the factors that change allele frequencies.
Gene pools, allele and genotype frequencies, the Hardy-Weinberg principle, and the forces that drive microevolution, for TCE Biology Unit 4.
8 min answer →

How do new species arise from existing ones?

Explain how reproductive isolation leads to speciation, including allopatric and sympatric modes.
How reproductive isolation produces new species, the difference between allopatric and sympatric speciation, and isolating mechanisms, for TCE Biology Unit 4.
7 min answer →