This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 7 Evolution – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 7 Evolution Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In an experiment, a population of bacteria is exposed to an antibiotic. After several generations, most of the bacteria are resistant to the antibiotic. What is the best explanation for this observation? A) The bacteria learned to resist the antibiotic. B) The antibiotic caused mutations in the bacteria. C) Resistant bacteria survived and reproduced. D) All bacteria were initially resistant. Show Answer Correct Answer: C) Resistant bacteria survived and reproduced. 2. Three different species of salamanders are found on five neighboring islands. These three species are similar to one species found on a nearby continent. Salamanders eat a variety of insects and plants. Evolution is most likely to occur when ..... A) There is an abundant amount of food. B) There are a variety of food sources. C) There is competition for resources. D) None of the above. Show Answer Correct Answer: C) There is competition for resources. 3. Which of the following is an example of a vestigial structure in humans? A) Appendix. B) Heart. C) Lungs. D) Brain. Show Answer Correct Answer: A) Appendix. 4. Which of the following is a true statement about natural selection? A) Natural selection is goal directed. B) Individuals evolve. C) Variation exists in a population. D) Acquired characteristics are passed on. Show Answer Correct Answer: C) Variation exists in a population. 5. The appendix, which is not needed to survive, is conisdered to be a A) Homologous Structure. B) Analagous Structure. C) Vestigial Structure. D) Homology. Show Answer Correct Answer: C) Vestigial Structure. 6. According to Lyell, how are geographical features formed? A) Slowly, forces such as erosion have accumulated over time. B) They appeared in a matter of hours. C) They appeared in a matter of a few years. D) Differently than they were created in the past. Show Answer Correct Answer: A) Slowly, forces such as erosion have accumulated over time. 7. A fire has wiped out the vegetation that produces medium sized seeds. As a result, the finches left can feed on seed that are available in two sizes:small and large. What type of selection is likely to take place in this population? A) Directional selection. B) Disruptive selection. C) Stabilizing selection. D) Artificial selection. Show Answer Correct Answer: B) Disruptive selection. 8. Variation in a population can be caused by A) Mutation. B) Crossing over. C) Random alignment/assortment of chromsomes. D) Random nature of fertilisation between sperm and ovum. E) All of the above. Show Answer Correct Answer: E) All of the above. 9. Which is not an example of evidence of evolution? A) Geographical evidence. B) Anatomical evidence. C) Fossil evidence. D) All are examples of evidence of evolution. Show Answer Correct Answer: D) All are examples of evidence of evolution. 10. Which one of the statements is true? A) Bacteria are still becoming more resistant to antibiotics. B) Antibiotics are being used less. C) Humans are becoming more resistant to bacteria. D) Antibiotics are becoming weaker. Show Answer Correct Answer: A) Bacteria are still becoming more resistant to antibiotics. 11. Changes that happen slowly over time is known as: A) Artificial Selection. B) Natural Selection. C) Variations. D) Evolution. Show Answer Correct Answer: D) Evolution. 12. Organisms that have the most DNA sequences in common A) Have the same number of legs. B) Are the least related. C) Are randomly distributed. D) Are the most related. Show Answer Correct Answer: D) Are the most related. 13. RNA World Theory states that ..... A) Life came from RNA. B) Life came from life. C) Life came from non living things. D) Life came from outer space. Show Answer Correct Answer: A) Life came from RNA. 14. Which of the following supports the hypothesis of an "RNA world" on early Earth? A) SomeRNA molecules are important catalysts in modern cells. B) The oldest known fossils contain traceamounts of RNA. C) Single-stranded RNA molecules arelinear and do not form three-dimensional shapes. D) RNA is the primary genetic material ofmany viruses. Show Answer Correct Answer: A) SomeRNA molecules are important catalysts in modern cells. 15. What is the fossil record? A) Are the remains or evidence of once-living organisms. B) Is the change over time in populations of related organisms. C) Is made up of all the fossils ever discovered on Earth. D) Occurs when the last individual organism of a species dies. Show Answer Correct Answer: C) Is made up of all the fossils ever discovered on Earth. 16. Which of the following pieces of evolution evidence contain both homologous and vestigial structures? A) Fossil record. B) Comparing embryology. C) Comparing biochemistry. D) Comparing anatomy. Show Answer Correct Answer: D) Comparing anatomy. 17. How are rats and mice related? A) They have very similar DNA sequences. B) They have no proteins in common. C) They have exactly the same DNA sequences. D) They have completely different DNA sequences. Show Answer Correct Answer: A) They have very similar DNA sequences. 18. The process by which a species of organisms change over time A) Extinction. B) Evolution. C) Generation. D) Speciation. Show Answer Correct Answer: B) Evolution. 19. Which of the following is an example of homologous structures? A) Wings of a bat and wings of a butterfly. B) Forelimbs of a whale and forelimbs of a bat. C) Tail fin of a fish and tail fin of a whale. D) Eyes of a human and eyes of an octopus. Show Answer Correct Answer: B) Forelimbs of a whale and forelimbs of a bat. 20. How many options should every branch in a dichotomous key have? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 21. Which of the following list the taxa from broadest to most specific? A) Domain, kingdom, class, order, phylum, family, genus, species. B) Species, genus, family, order, class, phylum, kingdom, domain. C) Domain, kingdom, phylum, class, order, family, genus, species. D) Phylum, kingdom, class, family, order, genus, domain, species. Show Answer Correct Answer: C) Domain, kingdom, phylum, class, order, family, genus, species. 22. An organism's ability to survive and reproduce in its environment refers to its A) Fitness. B) Variation. C) Selection. D) Mutation. Show Answer Correct Answer: A) Fitness. 23. The ..... provides information about organisms that have lived in the past. A) Natural selection. B) Fossil record. C) Generation. D) Species. Show Answer Correct Answer: B) Fossil record. 24. Which is the most modern definition for evolution? A) Change in populations of organisms over time. B) Change in traits of populations of organisms over time. C) Change in allele frequencies of populations of organisms over time. D) Change in adaptive characteristics of populations of organisms over time. Show Answer Correct Answer: C) Change in allele frequencies of populations of organisms over time. 25. When unrelated species evolve similar characteristics because they live in similarenvironments A) Divergent Evolution. B) Speciation. C) Convergent Evolution. D) Punctuated equilibrium. Show Answer Correct Answer: C) Convergent Evolution. 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