Log inSign up

MCAT Biological and Biochemical Foundations of Living Systems Flashcards: 1c Evolution Natural Selection

Study 1c Evolution Natural Selection in MCAT Biological and Biochemical Foundations of Living Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is gene flow (migration) and its typical effect on population differences?

Tap card or press Space to flip

ANSWER

Allele movement between populations; reduces population divergence. Gene flow homogenizes allele frequencies across populations by introducing alleles via migration, counteracting differentiation caused by drift or local selection.

1 / 25

MCAT Biological and Biochemical Foundations of Living Systems: Foundational Concept 1: Biomolecules and Metabolism

You are hereEvolutionary Mechanisms and Natural Selection (1C)25 cards

All flashcards

25 cards

What this deck covers

This deck focuses on 1c Evolution Natural Selection, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Biological and Biochemical Foundations of Living Systems.

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 50Practice questions for this set
A rare allele r in a small isolated snail population has no measurable effect on survival or reproduction. Over 20 generations, allele r fluctuates in frequency and is eventually lost, despite no consistent environmental change. The population size remains low throughout due to limited habitat area. Based on the scenario, which outcome is most consistent with genetic drift?
Choose an answer

Keep your progress across every deck

Free account · cards you mark are saved to it