This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 7 Evolution – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 7 Evolution Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. True or False:A variation is a difference that exists naturally among members of a population or species. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. ..... is when living things interbreed and live in the same place and time. A) Species. B) Evolution. C) DNA. D) None of the above. Show Answer Correct Answer: A) Species. 3. A vestigial organ is present in modern-day species, but its utility is lost. The presence of hip bones in modern whales is an example of a vestigial organ. Which statement can be concluded about the ancestors of whales? A) Ancestors of whales lived on land. B) Ancestors of whales lived in deep oceans. C) Ancestors of whales were fish-like organisms. D) Ancestors of whales were dependent on the sea for food. Show Answer Correct Answer: A) Ancestors of whales lived on land. 4. Which of the following was probably not present in the atmosphere of the primitive Earth? A) Methane. B) Oxygen. C) Water. D) Carbon dioxide. Show Answer Correct Answer: B) Oxygen. 5. A body part that is not used or not working by a modern organism but which was needed by its ancestors is called a A) Homologous structure. B) Analogous Structure. C) Vestigial Structure. D) Pharyngeal Pouch. Show Answer Correct Answer: C) Vestigial Structure. 6. In an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based on ..... A) Inheritance of natural variations. B) Inheritance of acquired characteristics. C) Natural selection. D) Survival of the fittest. Show Answer Correct Answer: B) Inheritance of acquired characteristics. 7. What is the study of chemical processes in living things? A) Biochemistry. B) Paleontology. C) Morphology. D) Biogeography. Show Answer Correct Answer: A) Biochemistry. 8. Whales are aquatic mammals that contain a pelvis bone. Even though it does not aid in its movement, the function must have been used by a common ancestor of the whale. Thus, the pelvis is referred to as a(n) A) Vestigial structure. B) Analogous structure. C) Homologous structure. D) None of the above. Show Answer Correct Answer: A) Vestigial structure. 9. Which of these descriptions is an example of an unused body structure? A) A bat's wing that enables it to fly. B) The tiny leg bones found in snakes that have no legs. C) The front legs of a dog that supports its weight as it walks and runs. D) The tentacles of an octopus that aid it in movement and catching prey. Show Answer Correct Answer: B) The tiny leg bones found in snakes that have no legs. 10. Which of the following groups of organisms are all chemotrophs? A) Cyanobacteria. B) Methanogens. C) Slime molds. D) Red algae. Show Answer Correct Answer: B) Methanogens. 11. An early stage in the development of an organism A) Geology. B) Embryo. C) Fossil. D) Speciation. Show Answer Correct Answer: B) Embryo. 12. In ..... selection, individuals with both extreme forms of the trait are at a selective advantage. A) Directional. B) Stabilizing. C) Disruptive. D) Natural. Show Answer Correct Answer: C) Disruptive. 13. In the context of evolution, what is the significance of a keystone species? A) They are the first to adapt to environmental changes. B) They help maintain the structure and integrity of the ecosystem. C) They are the most genetically diverse species. D) They are the fastest to reproduce. Show Answer Correct Answer: B) They help maintain the structure and integrity of the ecosystem. 14. What is the common origin of all life on Earth? A) A single-celled organism from Mars. B) A common ancestor that appeared billions of years ago. C) A group of diverse species. D) A unique plant species. Show Answer Correct Answer: B) A common ancestor that appeared billions of years ago. 15. The Gram-positive bacteria stain purple because A) They form endospore. B) They have cellulose layer. C) They have thick peptidoglycan layer. D) They have thin peptidoglycan layer. Show Answer Correct Answer: C) They have thick peptidoglycan layer. 16. The biogeography of ..... yields some of the best evidence for evolution. A) Rainforests. B) Islands. C) All the above. D) None of the above. Show Answer Correct Answer: B) Islands. 17. Whose studies on the variation of species and the development of traits in response to environmental pressures provided evidence for the concept of adaptation, a key component of evolutionary theory? A) Isaac Newton. B) Albert Einstein. C) Galileo Galilei. D) Charles Darwin. Show Answer Correct Answer: D) Charles Darwin. 18. Geologist, said the earth was very old. A) Lyell. B) Darwin. C) Shakespeare. D) Hutton. Show Answer Correct Answer: A) Lyell. 19. Evolution is defined as a(n) A) Idea that organisms better suited for their environment will survive and reproduce. B) Any physical or behavioral characteristic that helps an organism to better survive. C) Theory that organisms have changed gradually over a long period of time to form mew organisms. D) None of the above. Show Answer Correct Answer: C) Theory that organisms have changed gradually over a long period of time to form mew organisms. 20. V Ionizing radiation (such as X-rays or gamma rays) and ultraviolet (UV) radiation can cause DNA damage and mutations. A) Chemical Mutagens. B) Radiation Mutagens. C) Biological Mutagens. D) Environmental Mutagens. Show Answer Correct Answer: B) Radiation Mutagens. 21. Rabbits with long teeth survived better in the pHet simulation because A) They were able to bite the wolves. B) They could eat the food from the prickly bush. C) They looked scary to other rabbits who ran away. D) They were more attractive to other rabbits. Show Answer Correct Answer: B) They could eat the food from the prickly bush. 22. Differential survival and reproduction of individuals due to differences in phenotype A) Natural Selection. B) Artificial selection. C) Biogeography. D) Phenotype. Show Answer Correct Answer: A) Natural Selection. 23. Which of the following is NOT a condition that must be met for Hardy-Weinberg equilibrium? A) Large population size. B) No mutations. C) Dominant alleles more frequent than recessive alleles. D) No natural selection. Show Answer Correct Answer: C) Dominant alleles more frequent than recessive alleles. 24. The study of the distribution of organisms around the world A) Herpetology. B) Biogeography. C) Evolution. D) None of the above. Show Answer Correct Answer: B) Biogeography. 25. A ..... is a scientist who studies fossils. A) Biologist. B) Chemist. C) Paleontologist. D) Astronomer. Show Answer Correct Answer: C) Paleontologist. ← 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