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Questions and Answers
Which of the following best describes natural selection?
Which of the following best describes natural selection?
- A process by which individuals with random traits are more likely to survive and reproduce
- A process by which individuals with favorable traits are more likely to survive and reproduce (correct)
- A process by which individuals with unfavorable traits are more likely to survive and reproduce
- A process by which individuals with any traits are equally likely to survive and reproduce
Which of the following is NOT a requirement for natural selection to occur?
Which of the following is NOT a requirement for natural selection to occur?
- Heritability of traits
- Equal survival and reproduction rates for all individuals (correct)
- Competition for limited resources
- Variation in traits among individuals
Which of the following is an example of natural selection?
Which of the following is an example of natural selection?
- A fish swimming in a river
- A bird building a nest
- A population of insects developing resistance to a pesticide (correct)
- A flower blooming in spring
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Study Notes
Natural Selection
- Natural selection is the process by which populations of living organisms adapt and evolve over time in response to environmental pressures.
- It is a key mechanism of evolution that leads to the survival and reproduction of individuals with advantageous traits.
Requirements for Natural Selection
- There are three main requirements for natural selection to occur:
- Variation in a population (genetic variation)
- Heritability of the variation
- Differential reproduction rates based on the variation
Examples of Natural Selection
- Antibiotic resistance in bacteria is an example of natural selection, where bacteria that are resistant to antibiotics are more likely to survive and reproduce.
- The development of pesticide-resistant pests is another example, where pests that are resistant to pesticides are more likely to survive and reproduce.
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