Understanding Natural Selection and Evolution

Biology

An exploration of natural selection, the process by which populations change over time based on heritable traits and environmental pressures.

Evolution Genetics Ecology

14 Questions Medium Ages 12+ Sep 3, 2026

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This study set covers Biology through 14 practice questions. An exploration of natural selection, the process by which populations change over time based on heritable traits and environmental pressures. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 14 questions from the Understanding Natural Selection and Evolution study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the definition of natural selection?

A The process where organisms change their own DNA
B A process where individuals with favorable traits are more likely to survive and reproduce
C A process where all individuals in a population survive equally
D The study of fossils

2 What does the phrase 'survival of the fittest' actually mean?

A Survival of the strongest
B Survival of the most aggressive
C Survival of the best adapted
D Survival of the largest

3 What is a 'trait' in biological terms?

A A learned behavior
B A physical characteristic of an organism
C A choice made by an animal
D The age of an organism

4 Why is variation necessary for natural selection?

A It ensures all organisms are identical
B It allows for differences among individuals in a population
C It prevents reproduction
D It makes the environment safer

5 Which of the following is an example of an environmental pressure?

A Predators
B Climate changes
C Food availability
D All of the above

6 What happens to helpful traits over time within a population?

A They disappear
B They become more common
C They change randomly
D They are removed by the environment

7 Do individual organisms evolve during their lifetime?

A Yes, they evolve based on their needs
B Yes, they evolve as they grow older
C No, only populations evolve over time
D No, evolution is a myth

8 What is 'overproduction' in the context of natural selection?

A Producing fewer offspring than can survive
B Producing more offspring than the environment can support
C The process of cloning
D When animals stop reproducing

9 Which of these is a resource that organisms might compete for?

A Mates
B Food
C Shelter
D All of the above

10 If a rabbit lives in a snowy environment, which trait provides a survival advantage?

A Dark fur
B White fur
C Large ears
D Long legs

11 What is the final step in the 5 steps of natural selection?

A Environmental pressure occurs
B Variation exists
C Population changes over time
D Survivors reproduce

12 What is another term for 'Different survival and reproduction'?

A Differential reproductive success
B Genetic mutation
C Artificial selection
D Adaptation loss

13 Which of the following is an example of a trait?

A Beak shape
B Fur color
C Size
D All of the above

14 How are traits passed to the next generation?

A Through inheritance from parents
B By learning behaviors
C Through environmental exposure
D They are not passed on

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