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Evolution Practice Tests

These Grade 9 Biology practice tests explore how populations change over generations. Questions cover natural selection, adaptation, evolutionary evidence, population genetics, genetic drift, gene flow, speciation, and the effects of human activities.

Skills covered

  • Explaining variation, heritability, fitness, adaptation, and natural selection
  • Using fossils, anatomy, embryology, DNA, and biogeography as evidence for common ancestry
  • Distinguishing directional, stabilizing, disruptive, sexual, and artificial selection
  • Comparing genetic drift, bottlenecks, founder effects, gene flow, and recombination
  • Understanding reproductive isolation, speciation, conservation, antibiotic resistance, and human selection

How to use these practice tests

For each scenario, identify the heritable variation, environmental pressure, and difference in reproductive success. Remember that evolution is measured in populations across generations. Review the explanations to strengthen evolutionary reasoning and evidence analysis.

For more Grade 9 Science practice, return to the Grade 9 Science category.

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Grade 9 Evolution Practice Tests

Practice Grade 9 Science questions about natural selection, adaptation, evidence for evolution, population genetics, speciation, and human effects on evolution.

Choose the best answer. Distinguish changes in individuals from population-level evolution, identify the selection pressure, and use evidence to explain evolutionary relationships.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What can create new alleles in a population?

Please select an answer first.

Correct answer: A

The correct answer is Mutation..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Mutation changes DNA and can create new versions of a gene, although its effects vary.
  3. Check the answer: The correct answer is Mutation..

Mutation changes DNA and can create new versions of a gene, although its effects vary.

2. QuestionMultiple choice

What is a population gene pool?

Please select an answer first.

Correct answer: B

The correct answer is All the alleles present in a population..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: A gene pool includes the genetic variants carried by all members of a population.
  3. Check the answer: The correct answer is All the alleles present in a population..

A gene pool includes the genetic variants carried by all members of a population.

3. QuestionMultiple choice

What is allele frequency?

Please select an answer first.

Correct answer: C

The correct answer is The proportion of a particular allele in a population..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Allele frequency describes how common an allele is relative to all copies of that gene in the population.
  3. Check the answer: The correct answer is The proportion of a particular allele in a population..

Allele frequency describes how common an allele is relative to all copies of that gene in the population.

4. QuestionMultiple choice

What is genetic drift?

Please select an answer first.

Correct answer: D

The correct answer is A random change in allele frequencies, especially in small populations..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Genetic drift changes allele frequencies by chance and can have a strong effect in small populations.
  3. Check the answer: The correct answer is A random change in allele frequencies, especially in small populations..

Genetic drift changes allele frequencies by chance and can have a strong effect in small populations.

5. QuestionMultiple choice

What is a population bottleneck?

Please select an answer first.

Correct answer: A

The correct answer is A sharp reduction in population size that leaves a smaller, less representative gene pool..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: A bottleneck can reduce genetic diversity when a random event leaves only a small group of survivors.
  3. Check the answer: The correct answer is A sharp reduction in population size that leaves a smaller, less representative gene pool..

A bottleneck can reduce genetic diversity when a random event leaves only a small group of survivors.

6. QuestionMultiple choice

What is the founder effect?

Please select an answer first.

Correct answer: B

The correct answer is A new population is started by a small group whose allele frequencies may differ from the source population..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: The small founding group carries only part of the original gene pool, so chance can make some alleles unusually common.
  3. Check the answer: The correct answer is A new population is started by a small group whose allele frequencies may differ from the source population..

The small founding group carries only part of the original gene pool, so chance can make some alleles unusually common.

7. QuestionMultiple choice

What is gene flow?

Please select an answer first.

Correct answer: C

The correct answer is The movement of alleles between populations through migration and reproduction..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Gene flow introduces or removes alleles when individuals or gametes move between populations and reproduce.
  3. Check the answer: The correct answer is The movement of alleles between populations through migration and reproduction..

Gene flow introduces or removes alleles when individuals or gametes move between populations and reproduce.

8. QuestionMultiple choice

Why does genetic drift usually have a larger effect in small populations?

Please select an answer first.

Correct answer: D

The correct answer is Chance events affect a larger fraction of the gene pool..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: A random event can change the proportion of alleles much more when the population has few individuals.
  3. Check the answer: The correct answer is Chance events affect a larger fraction of the gene pool..

A random event can change the proportion of alleles much more when the population has few individuals.

9. QuestionMultiple choice

How does natural selection differ from genetic drift?

Please select an answer first.

Correct answer: A

The correct answer is Natural selection is associated with differences in fitness, while drift is random..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Selection changes allele frequencies because some heritable traits improve reproductive success, whereas drift changes frequencies by chance.
  3. Check the answer: The correct answer is Natural selection is associated with differences in fitness, while drift is random..

Selection changes allele frequencies because some heritable traits improve reproductive success, whereas drift changes frequencies by chance.

10. QuestionMultiple choice

What can sexual reproduction contribute to a population?

Please select an answer first.

Correct answer: B

The correct answer is New combinations of existing alleles..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Meiosis and fertilization recombine alleles, producing genetically varied offspring.
  3. Check the answer: The correct answer is New combinations of existing alleles..

Meiosis and fertilization recombine alleles, producing genetically varied offspring.

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