Natural Selection & Evolution

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What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What does the fossil record indicate about species?

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The fossil record provides evidence that older species gave rise to more-recent species.

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What is microevolution?

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Microevolution refers to small-scale evolutionary changes within a species, such as changes in allele frequencies.

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What is an example of microevolution?

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The evolution of pesticide resistance in pests is an example of microevolution.

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What role does genetic diversity play in natural selection?

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Genetic diversity allows for a greater chance of survival as individuals with varied traits can adapt to changing environments.

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How do environmental changes affect species?

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Environmental changes can lead to natural selection, where individuals better suited to the new conditions survive and reproduce.

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What is the significance of pelvic bones in baleen whales?

Back

The presence of pelvic bones in baleen whales indicates that they evolved from four-legged animals.

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What is the outcome when a species adapts to its environment?

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When a species adapts to its environment, it is more likely to survive and reproduce, leading to evolutionary changes.

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What is the relationship between natural selection and evolution?

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Natural selection is a mechanism of evolution, driving the process by which species change over time.

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What happens to the population of light moths when pollution decreases?

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As pollution decreases, light moths become more successful in surviving and reproducing compared to dark moths.