Understanding Evolution and Natural Selection

Which of the following best describes the scientific theory of evolution?

• A hypothesis that has been proven true.

• A well-supported explanation of natural phenomena.

• A guess about how species change over time.

• A law that describes how species are created.

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What type of evidence do fossils provide in support of the theory of evolution?

• They show that all species have remained unchanged over time.

• They demonstrate that species have evolved from earlier forms.

• They prove that evolution is a scientific law.

• They indicate that species appear suddenly without ancestors.

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How does natural selection contribute to evolution?

• By ensuring that all individuals in a species are identical.

• By favoring individuals with advantageous traits to survive and reproduce.

• By eliminating all genetic variations within a population.

• By causing immediate changes in an organism's DNA.

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Which of the following statements is true about scientific theories and laws?

• A scientific theory becomes a law once it is proven.

• A scientific law explains why phenomena occur.

• A scientific theory is a comprehensive explanation based on evidence.

• A scientific law is a guess about natural events.

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What role does genetic variation play in the process of natural selection?

• It decreases the chances of survival for a species.

• It provides the raw material for natural selection to act upon.

• It ensures that all individuals in a population are identical.

• It prevents any changes in a species over time.

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Why might a species become extinct if it cannot adapt to a changing environment?

• Because it will evolve into a new species.

• Because it will be unable to compete for resources and survive.

• Because it will develop new traits instantly.

• Because it will become a fossil.

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Which of the following is an example of fossil evidence supporting evolution?

• Fossils show that all species have always existed in their current form.

• Fossils reveal transitional forms between different groups of organisms.

• Fossils indicate that species appear suddenly without any ancestors.

• Fossils prove that evolution is a scientific law.

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What is the primary difference between a scientific theory and a scientific law?

• A theory is a guess, while a law is proven.

• A theory explains why phenomena occur, while a law describes what happens.

• A theory is less important than a law.

• A theory is a fact, while a law is an opinion.

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How does the fossil record support the theory of evolution?

• It shows that all species have remained unchanged over time.

• It provides evidence of gradual changes in species over long periods.

• It indicates that species appear suddenly without any ancestors.

• It proves that evolution is a scientific law.

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What is the significance of transitional fossils in understanding evolution?

• They show that species have always existed in their current form.

• They provide evidence of intermediate forms between different species.

• They prove that evolution is a scientific law.

• They indicate that species appear suddenly without any ancestors.

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