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Natural Selection & Selection Pressures: How Environments Shape Populations
Discover how environmental selection pressures drive evolutionary change by favouring heritable traits that improve survival and reproductive success.
What You'll Learn
Natural selection favours heritable traits improving survival and reproductive success.
Biotic and abiotic pressures determine which population traits become advantageous.
Directional, stabilising, and disruptive selection produce distinct population outcomes.
Biological fitness measures reproductive success relative to the current environment.
What You'll Practice
1
Students identify selection pressures in antibiotic resistance and moth scenarios.
2
Learners distinguish biotic, abiotic, and types of natural selection examples.
3
Questions test understanding of fitness, variation, and differential reproductive success.
Why This Matters
Understanding natural selection and selection pressures is essential for explaining evolutionary change, interpreting real-world biological phenomena such as antibiotic resistance, and informing conservation and medical science.
This Unit Includes
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Natural Selection
Selection Pressures
Biological Fitness
Genetic Variation
Adaptation
