Selection Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Which of the following best describes the role of genetic variation in natural selection?
- A. Genetic variation provides different alleles within a population, allowing some individuals to be better adapted to their environment
- B. Genetic variation is created by natural selection to help organisms survive
- C. Genetic variation ensures that all offspring are identical to their parents
- D. Genetic variation only occurs in animals, not in plants
2. In selective breeding of crops, what is the first step that farmers must take?
- A. Plant seeds from random plants in the field
- B. Select individual plants with desirable features and cross them together
- C. Wait for natural selection to improve the crop quality
- D. Introduce new alleles from wild populations
3. Why has the development of antibiotic-resistant bacteria been described as an example of natural selection?
- A. Bacteria were deliberately bred by humans to be resistant to antibiotics
- B. Antibiotic resistance randomly appears in all bacteria exposed to antibiotics
- C. Bacteria with resistance alleles survived antibiotic treatment and reproduced, passing resistance alleles to offspring, while non-resistant bacteria died
- D. Antibiotics cause mutations that make bacteria resistant
4. A breeder selects chickens that lay large eggs and crosses them. The offspring show variation in egg size. What must the breeder do to improve egg size over many generations?
- A. Stop breeding and allow natural selection to work
- B. Breed all the offspring together regardless of egg size
- C. Repeatedly select offspring with the largest eggs and breed them together
- D. Introduce completely new breeds of chicken each generation
5. Which of the following statements correctly identifies a key difference between natural and artificial selection?
- A. Natural selection is faster than artificial selection because it acts on all individuals
- B. Artificial selection is carried out by humans who deliberately choose individuals with desirable features, whilst natural selection is determined by environmental pressures and an organism's ability to survive and reproduce
- C. Natural selection only occurs in wild populations, whilst artificial selection only occurs in laboratories
- D. Both natural and artificial selection produce identical results in the same timeframe