This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 7 Evolution – Quiz 34 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 7 Evolution Quiz 34 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why do chicken embryo and a cow embryo look very similar even though the adults do not? A) They are not related, but still have similar development. B) They are distantly related, so their development is similar. C) The embryos mutate in utero to form different structures. D) The genetic makeup of the two species changes during development. Show Answer Correct Answer: B) They are distantly related, so their development is similar. 2. Which of the following statements about endosymbiotic theory is FALSE? A) Two (2) prokaryotes coevolved the form the first eukaryote. B) One prokaryote absorbed another prokaryote. C) Explains the evolution of the mitochondria and chloroplast. D) Prokaryotes evolved from the first eukaryotes. Show Answer Correct Answer: D) Prokaryotes evolved from the first eukaryotes. 3. Males of the bighorn sheep species fight one another to show females who is the dominant male and are more likely to mate with females. A) Natural Selection. B) Mutation. C) Genetic Drift. D) Non-Random Mating. Show Answer Correct Answer: D) Non-Random Mating. 4. These are structures that are similar in unrelated organisms. The structures are similar because they evolved to do the same job, not because they were inherited from a common ancestor. A) Homologous Structures. B) Analogous Structures. C) All the above. D) None of the above. Show Answer Correct Answer: B) Analogous Structures. 5. Paraphyletic group A) MRCA but not descendants. B) MRCA & descendents. C) Does not include anything. D) None of the above. Show Answer Correct Answer: A) MRCA but not descendants. 6. Variation is the result of ..... A) An organism consciously adapting to its environment. B) Randomly-occurring mutations. C) Both. D) Neither. Show Answer Correct Answer: B) Randomly-occurring mutations. 7. The past and present distribution of organisms is ..... A) Homologous structures. B) Biogeography. C) Common descent. D) None of the above. Show Answer Correct Answer: B) Biogeography. 8. ..... is when a a change in allele frequency following a dramatic reduction in the size of a population A) Gene Pool. B) Genetic Drift. C) Bottleneck Effect. D) Isolating Mechanisms. E) Founder Effect. Show Answer Correct Answer: C) Bottleneck Effect. 9. Scientist(s) who believed in uniformitarianism and that the Earth is very old A) Hutton & Lyell. B) Lamarck. C) Malthus. D) Darwin. Show Answer Correct Answer: A) Hutton & Lyell. 10. Darwin theorized that individuals having an advantage due to their traits or abilities will be more likely to survive in a given environment and reproduce. This theory is known as? (not change over time) A) Evolution. B) Speciation. C) Adaptation. D) Natural selection. Show Answer Correct Answer: D) Natural selection. 11. Body parts that have a similar function, but not a similar structure A) Analagous structures. B) Reproductive isolation. C) Vestigal structures. D) Homologous structures. Show Answer Correct Answer: A) Analagous structures. 12. Biodiversity at any time on Earth is the result of both the evolution and extinction of taxa. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. What is the main purpose of Linnaean classification in biology? A) Create new plant species. B) Determine the age of fossils. C) Classify chemical elements in the periodic table. D) Organize and categorize the diversity of living beings into hierarchical groups. Show Answer Correct Answer: D) Organize and categorize the diversity of living beings into hierarchical groups. 14. Tigers and crocodiles are more closely related than tigers and sharks.Which statement about shared characteristics best supports this statement? A) Crocodiles and sharks both live in water. B) Crocodiles and tigers are both made of cells. C) Crocodiles and tigers both have four legs. D) Sharks and tigers are both meat eaters. Show Answer Correct Answer: C) Crocodiles and tigers both have four legs. 15. The study of how animals have change over time is called A) Biology. B) Evolution. C) Taxonomy. D) Astrology. Show Answer Correct Answer: B) Evolution. 16. What must be true of any organ that is described as vestigial? A) It must be both homologous and analogous to some feature in an ancestor. B) It must be analogous to some feature in an ancestor. C) It must be homologous to some feature in an ancestor. D) It need be neither homologous nor analogous to some feature in an ancestor. Show Answer Correct Answer: C) It must be homologous to some feature in an ancestor. 17. If finches with average sized beaks increase in a population while finches with large and small sized beaks decrease, which pattern of natural selection has occurred? A) Directional selection. B) Disruptive selection. C) Stabilizing selection. D) Sexual Selection. Show Answer Correct Answer: C) Stabilizing selection. 18. A new organisms was discovered. It is unicellular, has no nucleus, and has a cell wall. In which kingdom would we classify this organism? A) Archaea. B) Bacteria. C) Protista. D) Plantae. Show Answer Correct Answer: B) Bacteria. 19. The idea that living things and the world are continuously changing A) Gradualism. B) Common descent. C) Perpetual change. D) Multiplication of species. Show Answer Correct Answer: C) Perpetual change. 20. Which of the following best describes genetic drift? A) A change in allele frequencies due to random events. B) The adaptation of organisms to their environment. C) The transfer of genes between populations. D) The selection of advantageous traits. Show Answer Correct Answer: A) A change in allele frequencies due to random events. 21. What is the primary mechanism by which evolution occurs? A) Genetic drift. B) Natural selection. C) Gene flow. D) Mutation. Show Answer Correct Answer: B) Natural selection. 22. What type of selection happens when either extreme of the phenotypes are selected? A) Stabilizing selection. B) Disruptive selection. C) Directional selection. D) None of the above. Show Answer Correct Answer: B) Disruptive selection. 23. In the context of evolution, what is the significance of homologous structures? A) They indicate common ancestry. B) They are evidence of convergent evolution. C) They are structures with similar functions. D) They are unique to each species. Show Answer Correct Answer: A) They indicate common ancestry. 24. A species of frog, over time and through mutations, becomes two species as it spreads from swamp to swamp. This is an example of: A) Adaptive radiation. B) Coevolution. C) Convergent evolution. D) None of the above. Show Answer Correct Answer: A) Adaptive radiation. 25. If an ecosystem lost a keystone species, which outcome would be expected? A) A new keystone species would replace the old keystone species. B) The oxygen supply in the ecosystem would be depleted. C) The population numbers of other species would change dramatically. D) The temperature of the ecosystem would increase. Show Answer Correct Answer: C) The population numbers of other species would change dramatically. ← 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