Quiz questions
Which observation from domesticated animals and plants did Darwin use to support his theory of natural selection?
- Selective breeding shows that small heritable differences can accumulate into large changes over generations
- Domesticated species never vary from their wild ancestors
- Domestication proves species are fixed and unchangeable
- Breeders always create new species in a single generation
What core idea does Darwin borrow from Malthus and apply to natural populations?
- Populations produce more offspring than can survive, creating a struggle for existence
- Organisms consciously change their traits to survive
- Resources always increase to match population growth
- Only the physically strongest individuals survive, regardless of heredity
Which best summarizes Darwin’s mechanism of natural selection?
- Heritable variation leads to differential reproductive success so advantageous traits become more common over generations
- Natural selection creates new useful traits de novo in individuals when needed
- Evolution proceeds only by sudden large jumps, not gradual change
- Acquired characteristics during an individual's life are inherited by offspring
How did Darwin explain the apparent lack of many intermediate fossil forms in the geological record?
- The geological record is imperfect—sedimentation is discontinuous and many intermediate forms are not preserved or have been destroyed
- He admitted that intermediate forms never existed and his theory was invalid
- All intermediate forms are abundant but have been ignored by paleontologists
- Transitional forms cannot fossilize at all due to biological constraints
Which lines of evidence did Darwin present in support of common descent?
- Homologous structures, embryological similarities, vestigial organs, and geographic distribution of species
- Each species arose independently with similarities only for similar functions
- Classification is purely subjective and unrelated to ancestry
- All similarities between species arise solely from having identical environments
Active recall prompts
Which observation from domesticated animals and plants did Darwin use to support his theory of natural selection?
What core idea does Darwin borrow from Malthus and apply to natural populations?
Which best summarizes Darwin’s mechanism of natural selection?
How did Darwin explain the apparent lack of many intermediate fossil forms in the geological record?
What is the main idea of "Variation Under Domestication", and how would you explain it without looking back?
What is the main idea of "Variation Under Nature", and how would you explain it without looking back?
What is the main idea of "The Struggle for Existence", and how would you explain it without looking back?
What is the main idea of "Natural Selection; or the Survival of the Fittest", and how would you explain it without looking back?