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qid 2992 · biology

Question: Which of these is the smallest unit upon which natural selection directly acts?

  1. an individual's genome
  2. a population's genetic variation
  3. a species' genetic mutation
  4. an individual's genetic makeup
  5. a population's gene frequency
  6. a population's genetic makeup
  7. an individual's phenotype
  8. a species' genetic diversity
  9. a species' gene frequency
  10. an individual's genetic mutation

Our answer: G. an individual's phenotype Source quote machine-checked (exact quote)

A machine check confirms the quoted words appear at the source. A person has not yet reviewed these. EARN MARKS as a Human Reviewer

How it was answered

Multi-step solver (maze), replayed by code

card: maze · card sha256 3a6db881bbc2720a…

Current source

OpenStax, Biology 2e, Section 19.3 "Adaptive Evolution"

https://openstax.org/books/biology-2e/pages/19-3-adaptive-evolution

“Natural selection acts on entire organisms, not on an individual allele within the organism.”

Source quote machine-checked (exact quote)

retrieved 2026-09-17T23:56:30.687Z

page text sha256 bdc993accc575e57… · content sha256 f6a44106734a98f6…

addendum maze_qid2992_b4_maze_input_ADDENDUM_source_rs20260917T235630Z · sha256 48889abcf8c7f750… · replaces the version below, addendum sha256 3650838436b8afed…

Earlier version (superseded)

https://openstax.org/books/biology-2e/pages/19-3-adaptive-evolution

Source weak (http_get_200_text_and_question_terms)

retrieved 2026-09-17T09:31:49.589Z

page text sha256 821cc8ef618350ed… · content sha256 —

addendum maze_qid2992_b4_maze_input_ADDENDUM_source_bf20260917T093149Z · sha256 3650838436b8afed… · replaces the version below, addendum sha256 8089da9a46662c4f…

Earlier version (superseded)

No public source has been found for this card yet (3 places checked internally).

addendum maze_qid2992_b4_maze_input_ADDENDUM_source · sha256 8089da9a46662c4f…

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