Natural/Artificial Selection & Evidence for Evolution Check

What is the primary source of genetic variation in a population?

• Natural selection

• Genetic drift

• Mutation

• Migration

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Which of the following is a mechanism of natural selection?

• Random mating

• Genetic drift

• Competition among offspring/species

• Artificial selection

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Which of the following best describes an evolutionary adaptation?

• A temporary change in an organism's behavior

• A heritable trait that increases an organism's fitness

• A random mutation that occurs in a population

• A learned behavior that improves survival

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Apply the concept of natural selection to explain why a population of moths might change color over time.

• The moths change color due to a sudden mutation.

• Predators see moths of a certain color more easily, leading to a change in population color over generations.

• The moths decide to change color to blend in with their environment.

• The moths change color because they migrate to a new area.

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Which of the following scenarios is an example of an organism adapting to its environment?

• A bird migrating to a warmer climate during winter

• A plant developing thicker leaves to conserve water in a desert

• A fish swimming upstream to spawn

• A mammal hibernating during the cold months

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Understanding the role of DNA in evolution, which statement is true?

• DNA is not involved in the process of evolution.

• DNA provides the genetic blueprint that can lead to evolutionary changes.

• DNA changes only when an organism decides to evolve.

• DNA is identical in all living organisms, showing no variation.

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Analyze the impact of environmental changes on the process of natural selection.

• Environmental changes have no impact on natural selection.

• Environmental changes can alter which traits are advantageous, affecting natural selection.

• Environmental changes always lead to the extinction of species.

• Environmental changes only affect non-living things.

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Apply your knowledge of natural selection to explain why antibiotic resistance is increasing in bacteria.

• Bacteria are choosing to become resistant to antibiotics.

• Antibiotics cause bacteria to mutate and become resistant.

• Bacteria with resistance genes survive and reproduce, passing on the resistance.

• Antibiotic resistance is a myth and does not occur.

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Which of the following is an example of a homologous structure?

• The wings of a bat and the wings of a butterfly

• The flippers of a whale and the wings of a bird

• The forelimbs of a human and the forelimbs of a cat

• The tail of a monkey and the tail of a fish

Evaluate the impact of a lack of genetic variation on a population's survival.

• It increases the population's ability to survive environmental changes.

• It has no impact on the population's survival.

• It decreases the population's ability to survive environmental changes.

• It ensures the population will thrive in any environment.

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