Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring. Over time, this leads to the accumulation of beneficial traits in a population. This unit test will assess your understanding of the basic principles of natural selection and how it shapes the diversity of life on Earth.
1. What is the main driving force behind natural selection?
A. Genetic drift
B. Mutation
C. Adaptation
D. Competition
2. Which of the following is NOT a requirement for natural selection to occur?
A. Variation in traits within a population
B. Heritability of traits
C. Genetic isolation
D. Differential reproductive success
3. How does natural selection lead to the evolution of a population?
A. By reducing genetic variation
B. By creating new mutations
C. By favoring certain traits over others in response to environmental pressures
D. By increasing gene flow between populations
4. Which of the following best describes the process of artificial selection?
A. Human intervention in the breeding of plants and animals to produce desired traits
B. Random changes in the genetic makeup of a population
C. Competition between individuals for limited resources
D. Predation as a selective pressure
5. How can the concept of natural selection be applied to understanding antibiotic resistance in bacteria?
A. Bacteria that are resistant to antibiotics survive and reproduce, leading to the evolution of antibiotic-resistant strains
B. Antibiotics cause mutations in bacteria, leading to new beneficial traits
C. Bacteria develop resistance to antibiotics through competition with other species
D. Antibiotic resistance in bacteria is a result of genetic drift, not natural selection
6. What is the relationship between natural selection and adaptation?
A. Natural selection is the process by which adaptations are created
B. Adaptations are the result of random genetic mutations, not natural selection
C. Natural selection acts on existing adaptations to favor those that improve survival and reproduction
D. Adaptations occur only in response to artificial selection, not natural selection
7. Give an example of how natural selection has led to the evolution of a specific trait in a species.
8. How does the process of genetic drift differ from natural selection in shaping the genetic diversity of a population?
9. Explain how the concept of fitness is related to natural selection and the survival of individuals in a population.
10. In what ways can human activities impact the process of natural selection in wild populations? Give specific examples.
Please answer the above questions to the best of your ability. Good luck on your unit test!
Natural selection unit test seventh grade
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