This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 7 Evolution – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 7 Evolution Quiz 1 (60 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) Brain. B) Heart. C) Appendix. D) Lungs. Show Answer Correct Answer: C) Appendix. 4. Which of the following is a true statement about natural selection? A) Acquired characteristics are passed on. B) Natural selection is goal directed. C) Individuals evolve. D) Variation exists in a population. Show Answer Correct Answer: D) Variation exists in a population. 5. The appendix, which is not needed to survive, is conisdered to be a A) Vestigial Structure. B) Homology. C) Homologous Structure. D) Analagous Structure. Show Answer Correct Answer: A) Vestigial Structure. 6. According to Lyell, how are geographical features formed? A) Differently than they were created in the past. B) They appeared in a matter of hours. C) Slowly, forces such as erosion have accumulated over time. D) They appeared in a matter of a few years. Show Answer Correct Answer: C) 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) Stabilizing selection. B) Directional selection. C) Disruptive selection. D) Artificial selection. Show Answer Correct Answer: C) 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. Changes that happen slowly over time is known as: A) Natural Selection. B) Artificial Selection. C) Evolution. D) Variations. Show Answer Correct Answer: C) Evolution. 11. 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. 12. RNA World Theory states that ..... A) Life came from life. B) Life came from outer space. C) Life came from RNA. D) Life came from non living things. Show Answer Correct Answer: C) Life came from RNA. 13. 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. 14. 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. 15. Which of the following pieces of evolution evidence contain both homologous and vestigial structures? A) Comparing biochemistry. B) Fossil record. C) Comparing embryology. D) Comparing anatomy. Show Answer Correct Answer: D) Comparing anatomy. 16. How are rats and mice related? A) They have no proteins in common. B) They have exactly the same DNA sequences. C) They have very similar DNA sequences. D) They have completely different DNA sequences. Show Answer Correct Answer: C) They have very similar DNA sequences. 17. The process by which a species of organisms change over time A) Evolution. B) Extinction. C) Generation. D) Speciation. Show Answer Correct Answer: A) Evolution. 18. 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. 19. How many options should every branch in a dichotomous key have? A) 3. B) 2. C) 4. D) 1. Show Answer Correct Answer: B) 2. 20. Which of the following list the taxa from broadest to most specific? A) Species, genus, family, order, class, phylum, kingdom, domain. B) Domain, kingdom, class, order, phylum, family, genus, species. C) Phylum, kingdom, class, family, order, genus, domain, species. D) Domain, kingdom, phylum, class, order, family, genus, species. Show Answer Correct Answer: D) Domain, kingdom, phylum, class, order, family, genus, species. 21. An organism's ability to survive and reproduce in its environment refers to its A) Variation. B) Mutation. C) Fitness. D) Selection. Show Answer Correct Answer: C) Fitness. 22. The ..... provides information about organisms that have lived in the past. A) Species. B) Generation. C) Fossil record. D) Natural selection. Show Answer Correct Answer: C) Fossil record. 23. 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. 24. When unrelated species evolve similar characteristics because they live in similarenvironments A) Punctuated equilibrium. B) Speciation. C) Divergent Evolution. D) Convergent Evolution. Show Answer Correct Answer: D) Convergent Evolution. 25. A population of snails has the dominant trait of brown stripes and the recessive trait of solid brown shell color. If the current population has 17% solid brown, what is the expected frequency of homozygous striped shells? A) 0.59. B) 59%. C) 35%. D) 0.35. Show Answer Correct Answer: C) 35%. 26. During a hurricane, a population of beetles almost gets completely wiped out. The only beetles that survived were lucky that they were in their nest at the time of the hurricane and had enough food to survive. A) Natural selection. B) Genetic Drift. C) Gene Flow. D) Non-Random Mating. Show Answer Correct Answer: B) Genetic Drift. 27. Which of the following best describes the concept of natural selection in the context of evolution? A) Survival of the fittest, where only the strongest individuals survive and reproduce. B) A process where individuals with favorable traits are more likely to survive and reproduce. C) A random process that leads to the development of new species over time. D) The inheritance of acquired characteristics from one generation to the next. Show Answer Correct Answer: B) A process where individuals with favorable traits are more likely to survive and reproduce. 28. What type of reproductive isolation is this example:Mating a Different Time of Day A) Behavioral Isolation. B) Geographic Isolation. C) Temporal Isolation. D) None of the above. Show Answer Correct Answer: C) Temporal Isolation. 29. Darwin was not the first to develop a theory of ..... , but his therooy is the one best supported by evidence today. A) Evolution. B) All things. C) Strings. D) Change. Show Answer Correct Answer: A) Evolution. 30. A well-tested concept that explains a wide range of observations is called a(an): A) Hypothesis. B) Experiment. C) Cause and effect. D) Scientific theory. Show Answer Correct Answer: D) Scientific theory. 31. Had idea that acquired traits would be passed to offspring. A) Darwin. B) Lamarck. C) Lyell. D) Malthus. Show Answer Correct Answer: B) Lamarck. 32. What is the significance of the fossil record in understanding evolution? A) It provides evidence of the existence of dinosaurs. B) It shows the chronological order of species appearance and extinction. C) It demonstrates the genetic similarities between different species. D) It explains the process of natural selection. Show Answer Correct Answer: B) It shows the chronological order of species appearance and extinction. 33. These scientists proved that organic molecules formed from inorganic molecules present in the Earth's early atmosphere when given energy from lightening. A) Lennon and mccartney. B) Watson and crick. C) Einstein and newton. D) Miller and Urey. Show Answer Correct Answer: D) Miller and Urey. 34. A mutation can be A) Harmful to an organism. B) Helpful and improve an organisms ability to exist. C) Have no effect on the organism. D) All of the Above. Show Answer Correct Answer: D) All of the Above. 35. Which is not an example of an adaptation? A) A bird's beak allows it to crack open hard nuts. B) A zebra's stripes allow it to confuse its predators. C) A frog's large hind legs allow it to jump from danger. D) A cat sleeps on the sofa to avoid the vacuum cleaner. Show Answer Correct Answer: D) A cat sleeps on the sofa to avoid the vacuum cleaner. 36. The discovery of a fossilized animal with teeth, a long bony tail, and feathered wings helped to establish which evolutionary sequence? A) Rodents to bats. B) Reptiles to birds. C) Aquatic organisms to land-based organisms. D) Invertebrates to flying organisms. Show Answer Correct Answer: B) Reptiles to birds. 37. The disproven mechanism of evolution that states organisms can pass on physical traits gained through behaviors in their lifetimes. A) Acquired Traits. B) Genetic Drift. C) Natural Selection. D) Population Bottleneck. Show Answer Correct Answer: A) Acquired Traits. 38. True or False:Natural Selection favors only the fittest phenotypes among existing variations within the population, which may not be the ideal trait A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 39. A human appendix, a whale's hip bones and a human tail are all: A) Nonexistent. B) Homologous structures. C) Examples of embryology. D) Vestigial structures. Show Answer Correct Answer: D) Vestigial structures. 40. What did Darwin observe on the coastline that lead him to understand the age of the Earth? A) Populations of species with a great range of genetic diversity. B) Layers in the coastline signifying millions of years of weathering. C) Ecosystems with great varieties of biodiversity. D) Different species with similarities with other species that lived in different areas. Show Answer Correct Answer: B) Layers in the coastline signifying millions of years of weathering. 41. Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian islands have different elaborate courtship rituals that involve fighting other males and stylized movements that attract females. What type of reproductive isolation does this represent? A) Habitat isolation. B) Postzygotic barriers. C) Behavioral isolation. D) Gametic isolation. E) Temporal isolation. Show Answer Correct Answer: C) Behavioral isolation. 42. What is speciation? A) Combining of tow species to form one with different traits. B) Timing of mating that prevents normal sexual selection. C) Divergence of two or more species from an existing one. D) Isolation that affects mating behaviors. Show Answer Correct Answer: C) Divergence of two or more species from an existing one. 43. A characteristic or trait that helps an organism survive in its environment is a/an (a) A) Natural instinct. B) Variation. C) A. adaptation. D) Skill. Show Answer Correct Answer: C) A. adaptation. 44. Which is an example of a trait that is an adaptation for cold climate but not for warm climate? A) Thick fur and fat. B) Long claws. C) Camoflauge. D) Poisonous chemicals. Show Answer Correct Answer: A) Thick fur and fat. 45. Measure of an organisms's ability to survive and produce offspring relative to other members of a population A) Adaptation. B) Variation. C) Fitness. D) Natural Selection. Show Answer Correct Answer: C) Fitness. 46. This occur because of the several mutagens like ultraviolet radiation and hazardous chemicals in the environment that can affect genes and chromosomes. A) Speciation. B) Evolution. C) Mutation. D) None of the above. Show Answer Correct Answer: C) Mutation. 47. Which of following is NOT example of bacteria? A) Nitrosomonas sp. B) S. aureus. C) Lactobacillus sp. D) Chlamydomonas sp. Show Answer Correct Answer: D) Chlamydomonas sp. 48. What barrier inhibits the formation of a mule (offspring of horse and donkey that is sterile)? A) Reduced hybrid fertility. B) Reduced hybrid viability. C) Gametic isolation. D) Hybrid breakdown. Show Answer Correct Answer: A) Reduced hybrid fertility. 49. ..... show clear changes in an organism over time, the environment organisms lived in, the time period the organism lived in, and where the organism lived. A) DNA. B) Fossils. C) Homologous structures. D) Vestigial structures. Show Answer Correct Answer: B) Fossils. 50. Common baboons live on the savanna in breeding groups called troops. While females tend to stay with the troop, younger or less dominant males may leave to join a neighboring troop. Which of these is a likely outcome of movement by young males? A) Gene flow occurs between populations. B) Allele frequencies suddenly change. C) Relative genotypic frequencies reach a constant state. D) Intermediate phenotypes increase in the species. Show Answer Correct Answer: A) Gene flow occurs between populations. 51. What is a change in a gene pool due to random events? A) Natural Selection. B) Evolution. C) Genetic Drift. D) Speciation. Show Answer Correct Answer: C) Genetic Drift. 52. Population involve not individuals A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 53. Which of the following would lead to genetic variation? A) Crossing over. B) Independent assortment. C) Mutations. D) All answers are correct. Show Answer Correct Answer: D) All answers are correct. 54. How are new traits introduced into a population? A) Mutations. B) Sex. C) Gene flow. D) All of the above. Show Answer Correct Answer: D) All of the above. 55. A diagram that shows how organisms are related to each other A) Karyotype. B) Punnett square. C) Cladogram. D) Bracket. Show Answer Correct Answer: C) Cladogram. 56. Different species of animals, living in the same area, cannot interbreed because A) They are genetically different. B) They are predator and prey. C) They have different food requirements. D) They are in different ecological niches. Show Answer Correct Answer: A) They are genetically different. 57. Which of the following best describes the concept of natural selection in evolutionary biology? A) The process by which organisms with favorable traits are more likely to survive and reproduce. B) The random change in allele frequencies in a population over time. C) The movement of individuals between populations, leading to changes in allele frequencies. D) The formation of new species as a result of genetic isolation. Show Answer Correct Answer: A) The process by which organisms with favorable traits are more likely to survive and reproduce. 58. Darwin knew artificial selection could change domestic species over time. He inferred that natural selection could also change species over time. In fact, he thought that if a species changed enough, it might evolve into a ..... A) New species. B) Second population. C) All the above. D) None of the above. Show Answer Correct Answer: A) New species. 59. What is the term for a structure in an organism that has lost all or most of its original function in the course of evolution? A) Adaptive structure. B) Analogous structure. C) Homologous structure. D) Vestigial structure. Show Answer Correct Answer: D) Vestigial structure. 60. The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), by ..... marked a milestone in the history of science and gave rise to modern molecular biology, which is largely concerned with understanding how genes control the chemical processes within A) Heredity. B) Gregor Mendel. C) James Watson and Francis Crick. D) Chromosomes. Show Answer Correct Answer: C) James Watson and Francis Crick. Next →Related QuizzesScience QuizzesClass 12 QuizzesClass 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books