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Biology Flashcards: Evaluate Evidence For Population Change

Study Evaluate Evidence For Population Change in Biology with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

Which type of selection favors one extreme phenotype and shifts the mean?

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ANSWER

Directional selection. Population mean moves toward one end of the trait distribution.

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Biology: Biological Evolution: Unity and Diversity

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This deck focuses on Evaluate Evidence For Population Change, giving you a quick way to review the definitions, rules, and examples that matter most for Biology.

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Practice questions

1 of 49Practice questions for this set
Claim: A lizard population evolved longer legs after colonizing an island with wider tree branches. Evidence:
  1. On the mainland (source population), mean hind-leg length is 32 mm; on the island 15 years later (about 15 generations), mean hind-leg length is 39 mm.
  2. On the island, lizards with longer legs run faster on wide branches in performance tests.
  3. A few island lizards were observed stretching their legs while basking.
  4. Genetic data show that alleles associated with longer legs are more common in the island population than in the original mainland population.
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