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AP Biology Flashcards: Natural Selection Continued

Study Natural Selection Continued in AP Biology with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

Identify a process that can counteract natural selection by maintaining variation.

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ANSWER

Gene flow. Immigration introduces new alleles that may be selected against.

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AP Biology: Natural Selection

You are hereNatural Selection (Continued)39 cards

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39 cards

What this deck covers

This deck focuses on Natural Selection Continued, giving you a quick way to review the definitions, rules, and examples that matter most for AP Biology.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 46Practice questions for this set
In a bird population, beak depth varies continuously. Over 15 years, rainfall becomes more consistent and seeds are mostly medium hardness each season. Researchers measure beak depth and track reproductive success. Birds with intermediate beak depth consistently leave more surviving offspring than birds with either very shallow or very deep beaks. Across generations, the population mean beak depth changes little, but the proportion of extreme beak depths declines. Which pattern best illustrates the observed selection on beak depth?
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