This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 7 Evolution – Quiz 54 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 7 Evolution Quiz 54 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Fitness is described as ..... A) The ability to live and reproduce. B) Any physical feature that increases the chances of surviving in a population. C) A drastic decrease in the size of the population that decreases the biodiversity. D) How athletic an organism is. Show Answer Correct Answer: A) The ability to live and reproduce. 2. Based on comparative anatomy, which structure would be homologous to the arm of a human? A) Leg of a bird. B) Wing of a bat. C) Sternum of a horse. D) Foot of a chimpanzee. Show Answer Correct Answer: B) Wing of a bat. 3. Some elephants have short trunks while others have long trunks this is an example of A) Variation. B) Survival of the fittest. C) Evolution. D) None of the above. Show Answer Correct Answer: A) Variation. 4. A very old fossil is found that looks like a modern day alligator. This is an example of ..... A) Species vary globally. B) Species vary locally. C) Species vary over time. D) None of the above. Show Answer Correct Answer: C) Species vary over time. 5. Genetic Drift is the loss of genetic diversity due to a random event such as a natural disaster. What effect would genetic drift have on a population's gene pool? A) A smaller gene pool. B) A larger gene pool. C) No change in gene pool size. D) None of the above. Show Answer Correct Answer: A) A smaller gene pool. 6. Over time, early organisms were ..... and became more ..... A) Complex, simple. B) Uncommon, common. C) Simple, complex. D) Younger, older. Show Answer Correct Answer: C) Simple, complex. 7. Layered fossils create a historical sequence (timeline) is known as ..... A) Natural Selection. B) Evolution. C) Fossil Record. D) Extinction. Show Answer Correct Answer: C) Fossil Record. 8. The process of grouping things based on their similarities. A) Species. B) Classification. C) Genus. D) Taxonomy. Show Answer Correct Answer: B) Classification. 9. Which of the following separates the DNA strands during replication? A) Helicase. B) DNA polymerase. C) Primase. D) None of the above. Show Answer Correct Answer: A) Helicase. 10. Over many generations, ..... traits become more common in the population. A) Favorable. B) Harmful. C) Random. D) Temporary. Show Answer Correct Answer: A) Favorable. 11. What are analogous structures? A) Structures with a common evolutionary origin. B) Structures that look similar but have unrelated evolutionary origins. C) Structures that are identical in all species. D) Structures that have no function. Show Answer Correct Answer: B) Structures that look similar but have unrelated evolutionary origins. 12. On two Arizona lava flows, dark brown rock pocket mice were found to have a advantage for survival over pale brown mice because ..... A) All dark mice had the same mutation. B) Some mice moved across the desert to the other lava flow and bred. C) Two different mutations created different black mice that were able to survive the visual predators on each lava flow. D) Only one gene controls the fur colour of the mice. Show Answer Correct Answer: C) Two different mutations created different black mice that were able to survive the visual predators on each lava flow. 13. What term describes structures in different species that are similar in form but not necessarily in function, indicating a common ancestry? A) Analogous structures. B) Vestigial structures. C) Homologous structures. D) Convergent structures. Show Answer Correct Answer: C) Homologous structures. 14. What is the founder effect? A) A decrease in genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. B) An increase in genetic variation due to mutations. C) The effect of natural selection on a population. D) The process by which species become extinct. Show Answer Correct Answer: A) A decrease in genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. 15. What change in jaw size is typically observed in the evolution of hominids from early ancestors to modern humans? A) Jaw size has consistently decreased. B) Jaw size has remained constant. C) Jaw size has progressively increased. D) Jaw size has fluctuated unpredictably. Show Answer Correct Answer: A) Jaw size has consistently decreased. 16. What is the primary purpose of the biological classification system? A) To organize living organisms into groups based on similarities. B) To determine the age of fossils. C) To study the genetic makeup of organisms. D) To track the migration patterns of animals. Show Answer Correct Answer: A) To organize living organisms into groups based on similarities. 17. The study of similarities and differences among structures of living species is called ..... A) Comparative anatomy. B) Common ancestor. C) Variation. D) Homologous structures. Show Answer Correct Answer: A) Comparative anatomy. 18. If the frequency of dominant phenotype is 0.36, what is the frequency of the dominant allele? A) 0.2. B) 0.48. C) 0.6. D) 0.8. Show Answer Correct Answer: A) 0.2. 19. What is coevolution? A) The study of prehistoric life. B) The study of the structures of organisms. C) When two or more species affect each other's evolution through the process of natural selection. D) Over generations, organisms evolve a variety of characteristics that allow them to survive in different environments. Show Answer Correct Answer: C) When two or more species affect each other's evolution through the process of natural selection. 20. Group of organisms capable of interbreeding and producing fertile offspring. A) Species. B) Gene pool. C) Population. D) Homologous structure. Show Answer Correct Answer: A) Species. 21. When genetic information travels from one population to another it is called ..... A) Variation. B) Gene flow. C) Bottleneck effect. D) Genetic drift. Show Answer Correct Answer: B) Gene flow. 22. A piece of DNA that codes for a trait and causes heredity? A) Allele. B) Genes. C) Dominant Trait. D) Recessive Trait. Show Answer Correct Answer: B) Genes. 23. Embryos of difference species are similar. This is what example of evolution? A) Anatomical. B) Molecular. C) Fossil. D) Embryology. Show Answer Correct Answer: D) Embryology. 24. Which of the following is an example of descent with modification in bearded dragons? A) A bearded dragon population will mostly all have the beneficial adaptation of camouflage scales acquired through many generations of inheritance. B) A bearded dragon that grows to the same size as its parents. C) Bearded dragons that live in the same area as their parents. D) A bearded dragon that eats the same type of insects as its parents. Show Answer Correct Answer: A) A bearded dragon population will mostly all have the beneficial adaptation of camouflage scales acquired through many generations of inheritance. 25. Slow in steady change in a species A) Gradualism. B) Punctuated Equilibrium. C) All the above. D) None of the above. Show Answer Correct Answer: A) Gradualism. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 7 Evolution Quiz 1Class 12 Biology Chapter 7 Evolution Quiz 2Class 12 Biology Chapter 7 Evolution Quiz 3Class 12 Biology Chapter 7 Evolution Quiz 4Class 12 Biology Chapter 7 Evolution Quiz 5Class 12 Biology Chapter 7 Evolution Quiz 6Class 12 Biology Chapter 7 Evolution Quiz 7Class 12 Biology Chapter 7 Evolution Quiz 8Class 12 Biology Chapter 7 Evolution Quiz 9Class 12 Biology Chapter 7 Evolution Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books