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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 is selective breeding?

Please select an answer first.

Correct answer: A

The correct answer is Choosing parents with desired traits so their offspring are more likely to have those traits..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Selective breeding is artificial selection in which people choose organisms with desirable heritable traits to reproduce.
  3. Check the answer: The correct answer is Choosing parents with desired traits so their offspring are more likely to have those traits..

Selective breeding is artificial selection in which people choose organisms with desirable heritable traits to reproduce.

2. QuestionMultiple choice

Why can selective breeding reduce genetic diversity?

Please select an answer first.

Correct answer: B

The correct answer is Repeatedly choosing a small set of parents can make some alleles less common or disappear..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: A narrow breeding population can lose alleles and increase the risk of inherited problems.
  3. Check the answer: The correct answer is Repeatedly choosing a small set of parents can make some alleles less common or disappear..

A narrow breeding population can lose alleles and increase the risk of inherited problems.

3. QuestionMultiple choice

Why can antibiotic resistance be considered an example of evolution?

Please select an answer first.

Correct answer: C

The correct answer is The frequency of resistance alleles increases in the bacterial population over generations..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Evolution is measured at the population level; selection increases heritable resistance in later generations.
  3. Check the answer: The correct answer is The frequency of resistance alleles increases in the bacterial population over generations..

Evolution is measured at the population level; selection increases heritable resistance in later generations.

4. QuestionMultiple choice

What is a likely evolutionary response when a pesticide kills susceptible insects but resistant insects survive?

Please select an answer first.

Correct answer: D

The correct answer is The resistant allele may become more common in later generations..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Survivors with resistance reproduce and pass on their alleles, increasing resistance frequency.
  3. Check the answer: The correct answer is The resistant allele may become more common in later generations..

Survivors with resistance reproduce and pass on their alleles, increasing resistance frequency.

5. QuestionMultiple choice

Why can a changing environment alter which traits are advantageous?

Please select an answer first.

Correct answer: A

The correct answer is Fitness depends on how traits interact with current environmental conditions..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: A trait that improves survival in one environment may be neutral or harmful in another.
  3. Check the answer: The correct answer is Fitness depends on how traits interact with current environmental conditions..

A trait that improves survival in one environment may be neutral or harmful in another.

6. QuestionMultiple choice

How can an invasive species affect evolution in a native population?

Please select an answer first.

Correct answer: B

The correct answer is It can create new competition or predation pressures that change which traits improve fitness..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: New competitors, predators, or diseases can change selection pressures on native populations.
  3. Check the answer: The correct answer is It can create new competition or predation pressures that change which traits improve fitness..

New competitors, predators, or diseases can change selection pressures on native populations.

7. QuestionMultiple choice

Why is maintaining genetic diversity useful for conservation?

Please select an answer first.

Correct answer: C

The correct answer is It gives populations more variation that may help them respond to future changes..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Genetic diversity can improve a population's capacity to withstand disease, climate changes, and other pressures.
  3. Check the answer: The correct answer is It gives populations more variation that may help them respond to future changes..

Genetic diversity can improve a population's capacity to withstand disease, climate changes, and other pressures.

8. QuestionMultiple choice

Which statement about evolution is correct?

Please select an answer first.

Correct answer: D

The correct answer is Populations evolve over generations; individual organisms do not evolve during their lifetimes..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Inherited changes in allele frequencies occur across generations in populations, not as directed genetic changes within one lifetime.
  3. Check the answer: The correct answer is Populations evolve over generations; individual organisms do not evolve during their lifetimes..

Inherited changes in allele frequencies occur across generations in populations, not as directed genetic changes within one lifetime.

9. QuestionMultiple choice

Why is evolution supported by multiple lines of evidence?

Please select an answer first.

Correct answer: A

The correct answer is Fossils, anatomy, embryology, biogeography, and molecular data show related patterns..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Independent evidence from several fields converges on common ancestry and change through time.
  3. Check the answer: The correct answer is Fossils, anatomy, embryology, biogeography, and molecular data show related patterns..

Independent evidence from several fields converges on common ancestry and change through time.

10. QuestionMultiple choice

Which statement best describes evolution?

Please select an answer first.

Correct answer: B

The correct answer is It explains changes in populations and does not imply that every organism becomes more complex or perfect..

  1. Identify the evolution concept: Determine whether the question concerns evidence, natural selection, population change, adaptation, or speciation.
  2. Apply the evolutionary principle: Evolution has no predetermined goal; it reflects inherited variation, selection, drift, gene flow, and changing environments.
  3. Check the answer: The correct answer is It explains changes in populations and does not imply that every organism becomes more complex or perfect..

Evolution has no predetermined goal; it reflects inherited variation, selection, drift, gene flow, and changing environments.

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