This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 7 Evolution – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 7 Evolution Quiz 19 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A scientific theory is proven and based on evidence. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. The appearance of an organism based on a multifactorial combination of genetic traits and environmental factors. A) Genotype. B) Gene Flow. C) Mutation. D) Phenotype. Show Answer Correct Answer: D) Phenotype. 3. A structure that an organism has but no longer serves a function. A) Homologous Structure. B) Vestigial Structure. C) Archaic Structure. D) Analogous Structure. Show Answer Correct Answer: B) Vestigial Structure. 4. Which of the following statements explains genetic variation? Genetic variation arises ..... A) When organisms need to change in order to survive in a new environment. B) Through mutation and sexual recombination. C) From environmental changes that affect organisms. D) From traits acquired during the lifetime of an organism. Show Answer Correct Answer: B) Through mutation and sexual recombination. 5. Which word is defined as a reduced form of a functional structure in 1 organism that shows up as fully functional in another? A) Homologous structures. B) Analogous structure. C) DNA. D) Vestigial structures. Show Answer Correct Answer: D) Vestigial structures. 6. Which of the following best explains the concept of punctuated equilibrium? A) Evolution occurs at a slow and steady pace. B) Evolution occurs in rapid bursts followed by long periods of stability. C) Evolution occurs only during periods of environmental change. D) Evolution occurs at a constant rate over time. Show Answer Correct Answer: B) Evolution occurs in rapid bursts followed by long periods of stability. 7. Which is a mechanism for change in allele frequency? A) Gene flow. B) Genetic drift. C) Natural selection. D) All answers are correct. Show Answer Correct Answer: D) All answers are correct. 8. Which of the following statements about the DNA of two species is TRUE? A) You cannot conclude anything about common ancestry using DNA evidence. B) The more similar the DNA, the more distant the common ancestor is likely to be. C) The more similar the DNA, the more recent the common ancestor is likely to be. D) The more different the DNA, the more likely it is that their common ancestor is extinct. Show Answer Correct Answer: C) The more similar the DNA, the more recent the common ancestor is likely to be. 9. Cystic Fibrosis is the most common genetic disease in Caucasian populations. Parents can be carriers and be unaffected. This means the disease is A) Recessive. B) Missense mutation. C) Domminant. D) A single point mutation. Show Answer Correct Answer: A) Recessive. 10. What does 'fitness' mean in a biological context? A) The physical strength of an organism. B) The number of offspring an organism produces. C) The speed at which an organism can move. D) The ability to survive in harsh conditions. Show Answer Correct Answer: B) The number of offspring an organism produces. 11. What is the study of embryos and their development to understand evolutionary relationships called? A) Genetics. B) Taxonomy. C) Paleontology. D) Embryology. Show Answer Correct Answer: D) Embryology. 12. What is a fossil? A) Remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock. B) Can only be found about for humans. C) Show that there has never been other species on earth. D) An individual animal, plant, or single-celled life form. Show Answer Correct Answer: A) Remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock. 13. Which is NOT an ideal condition for bacteria to grow? A) Dark places with a food supply. B) Warm. C) Moist. D) Cool. Show Answer Correct Answer: D) Cool. 14. What is the process in which humans breed organisms for certain traits? A) Inheritance. B) Descent withOUT modification. C) Natural selection. D) Artificial selection. Show Answer Correct Answer: D) Artificial selection. 15. The average length of a rabbit's ears decreases the farther north the rabbits live. This variation is an example of A) Genetic drift. B) Geographic isolation. C) Founder effect. D) Cline. Show Answer Correct Answer: D) Cline. 16. Which IS NOT used as evidence for evolution? A) Natural Selection. B) Fossils. C) DNA/Proteins. D) Body Structure/Anatomy. E) Early Development/Embryos. Show Answer Correct Answer: A) Natural Selection. 17. An organism's relative ability to survive and produce fertile offspring is known as ..... A) Struggle for existence. B) Fitness. C) All the above. D) None of the above. Show Answer Correct Answer: B) Fitness. 18. The process by which unrelated organism evolve similar characteristics is called A) Ordering. B) Biology. C) Classification. D) Convergent evolution. Show Answer Correct Answer: D) Convergent evolution. 19. Evolution is the widely held notion that all life is related and has descended from a common ancestor:the birds and the bananas, the fishes and the flowers ..... all related That is, complex creatures evolve from more simplistic ancestors naturally over time. A) Fact. B) Theory. C) Law. D) None of the above. Show Answer Correct Answer: B) Theory. 20. According to the concept of punctuated equilibrium, the "sudden" appearance of a new species in the fossil record means that A) Speciation occurred rapidly in geologic time. B) Speciation occurred in one generation. C) The species will consequently have a relatively short existence, compared with other species. D) Speciation occurred instantaneously. Show Answer Correct Answer: A) Speciation occurred rapidly in geologic time. 21. After which event could you say that evolution has occurred? A) A new predator comes into an environment. B) An animal gets fat. C) A white-eyed fly is born into a population of brown-eyed flies. D) An allele frequency changes in a population. Show Answer Correct Answer: D) An allele frequency changes in a population. 22. Individuals with traits that give them a higher probability of surviving and reproducing at a rate greater than other individuals in an environment become more common in the population. What is this part of the evolutionary mechanism called? A) Natural selection. B) Genetic drift. C) Gene flow. D) Mutation. Show Answer Correct Answer: A) Natural selection. 23. A similar bone or organ within many different species of life is a ..... A) Homologous structure. B) Vestigial structure. C) All the above. D) None of the above. Show Answer Correct Answer: A) Homologous structure. 24. Also known as migration, is the transfer of genes (alleles) from one population to another. It occurs when individuals or gametes (reproductive cells) move between populations and interbreed with members of the new population. A) Founder Effect. B) Bottleneck Effect. C) Mutation. D) Gene Flow. Show Answer Correct Answer: D) Gene Flow. 25. What is the result of "Survival of the Fittest" ? A) Evolution (populations change over time). B) Genetic Equilibrium (populations remain unchanged over time). C) All the above. D) None of the above. Show Answer Correct Answer: A) Evolution (populations change over time). 26. Which are two factors that change gene frequencies in a population? A) No mutations and large populations. B) No migrations and no mutations. C) Large populations and random mating. D) Mutations and non random mating. Show Answer Correct Answer: D) Mutations and non random mating. 27. The scientist who first understood that animals change over time to adapt to their environment was A) Charles Darwin. B) Carolus Linnacus. C) Socrates. D) Galileo. Show Answer Correct Answer: A) Charles Darwin. 28. The bottleneck effect and founder effect are results of A) Gene flow. B) Genetic drift. C) Natural selection. D) Non-random mating. E) Mutations. Show Answer Correct Answer: B) Genetic drift. 29. How well an organism survives and reproduces in its environment can be described as its ..... A) Fitness. B) Analogies. C) Homologies. D) Common descent. Show Answer Correct Answer: A) Fitness. 30. If a ..... benefited a tortoise, allowing it to compete for food better than other tortoises, the tortoise lived longer, reproduced more, and passed on its variations to its off spring. A) Food. B) Similarity. C) Variation. D) Resource. Show Answer Correct Answer: C) Variation. 31. Taxonomy is the study of ..... organisms. A) Classifying. B) Dissecting. C) All the above. D) None of the above. Show Answer Correct Answer: A) Classifying. 32. How has antibiotic resistance changed over time? A) It hasn't changed at all. B) Antibiotics are being made cheaply and bacteria are becoming more resistant. C) Humans are buying less antibiotics and becoming weaker. D) Bacteria are becoming more resistant to the antibiotics that are being perscribed. Show Answer Correct Answer: D) Bacteria are becoming more resistant to the antibiotics that are being perscribed. 33. Structures are similar in function but not in anatomical structure A) Vestigial. B) Embryonic. C) Analogous Structures. D) Homologous. Show Answer Correct Answer: C) Analogous Structures. 34. The only taxon that actually exists as a natural unit is A) Class. B) Domain. C) Family. D) Species. Show Answer Correct Answer: D) Species. 35. The wing of a bat and a humans' arm have different functions and appear very different. Yet, the underlying anatomy is basically the same. therefore, these structures are examples of A) Reproductive isolation. B) Homology. C) Analogous structures. D) Geographic isolation. Show Answer Correct Answer: B) Homology. 36. What kinds of rocks hold the most fossils? A) Amber. B) Igneous. C) Sedimentary. D) Aggregate. Show Answer Correct Answer: C) Sedimentary. 37. What is the difference between Homologous and Analogous structures? A) Homologous:same structure, different function.Analogous:same structure, same function. B) Homologous:Cladograms, Poly.Analogous:Vial, Friend. C) Homologous:different structure, same function.Analogous:different function, same structure. D) Homologous:same structure, different function.Analogous:same function, different structure. Show Answer Correct Answer: D) Homologous:same structure, different function.Analogous:same function, different structure. 38. One explanation for the variety of organisms present on Earth today is that over time A) Evolution has caused the appearance of organisms that are similar to each other. B) Each niche has changed to support a certain variety of organisms. C) The environment has remained unchanged, causing rapid evolution. D) New species have adapted to fill available niches in the environment. Show Answer Correct Answer: D) New species have adapted to fill available niches in the environment. 39. It is very common for yellow labs to have bad hips. This is because owners want purebred yellow labs who are good hunting dogs. This is an example of A) Natural Selection. B) Inbreeding. C) Fossil Record. D) Hybridization. Show Answer Correct Answer: B) Inbreeding. 40. In an experiment, scientists observed that bacteria exposed to antibiotics over several generations developed resistance. What does this experiment demonstrate? A) Genetic drift. B) Natural selection. C) Artificial selection. D) Gene flow. Show Answer Correct Answer: B) Natural selection. 41. The groups in a phylogenetic tree are called ..... A) Branches. B) Nodes. C) Taxa. D) Roots. Show Answer Correct Answer: C) Taxa. 42. The statement that "nature selections the most fittest organisms" corresponds who discovery while on the Galapagos Islands? A) Darwin. B) Wallace. C) Lamarck. D) None of the above. Show Answer Correct Answer: A) Darwin. 43. Which one does not increase variation? A) Crossing Over. B) Migration. C) Gene flow. D) Mitosis. Show Answer Correct Answer: D) Mitosis. 44. Analogous Structures A) Structures in different species that have the same function but have evolved separately, thus do not share common ancestor. B) Structures in different species that have the same origin but serve different functions. C) Structures that are similar in function and origin, indicating a common ancestor. D) Structures that are identical in function and structure across all species. Show Answer Correct Answer: A) Structures in different species that have the same function but have evolved separately, thus do not share common ancestor. 45. Which of the following is a basic requirement for natural selection to be an effective evolutionary force? A) Individuals reproduce at a rapid rate. B) Each population must be limited to a large size. C) A population must exhibit no genetic variability. D) None of the above. Show Answer Correct Answer: A) Individuals reproduce at a rapid rate. 46. This is a group of organisms of the same species that live in a specific geographical area. A) Environment. B) Populations. C) Biological diversity. D) Evolution. Show Answer Correct Answer: B) Populations. 47. Trait that has evolved through natural selection to increase the fitness of an organism in its environment. Exaptation is a trait that evolved for one purpose but has been co-opted for different function. A) Inbreeding. B) Artificial Selection. C) Adaptation. D) Natural Selection. Show Answer Correct Answer: C) Adaptation. 48. What type of reproductive isolation is this example:Different Mating Rituals A) Behavioral Isolation. B) Geographic Isolation. C) Temporal Isolation. D) None of the above. Show Answer Correct Answer: A) Behavioral Isolation. 49. When has speciation occurred? A) When populations no longer look the same. B) When populations no longer have the same frequency of alleles. C) When populations are living in different environments. D) When populations can no longer interbreed. Show Answer Correct Answer: D) When populations can no longer interbreed. 50. Which of the following pieces of evolution evidence deals with structures common in embryos that form differently or for different purposes in adult form? A) Comparing anatomy. B) Comparing biochemistry. C) Comparing embryology. D) Fossil record. Show Answer Correct Answer: C) Comparing embryology. 51. Video Click HereWhich of the following main ideas is supported by the film? A) Feathered birds evolved after the extinction of the dinosaurs. B) Dinosaurs and birds are both warm-blooded (endothermic). C) Birds evolved one trait at a time. D) Only toothless birds survived the great extinction event 66 million years ago. Show Answer Correct Answer: D) Only toothless birds survived the great extinction event 66 million years ago. 52. Reindeer from a rancher in Alaska escape from their pen during an enormous snow storm. After their escape, they mate with wild caribou that are migrating across the land. The offspring of these have traits for short legs and have tame behavior. A) Gene Flow. B) Genetic Drift. C) Non-Random Mating. D) Natural Selection. Show Answer Correct Answer: A) Gene Flow. 53. Some mutations have a major positive or negative effect on an organism's phenotype. Many mutations, however, have no effect on phenotype. What are these mutations called? A) Reverse mutations. B) Point mutations. C) Neutral mutations. D) Inversion mutations. Show Answer Correct Answer: C) Neutral mutations. 54. What adaptation prevented moths from being eaten by birds? A) Camouflage coloring. B) Bright colors. C) Fast flying. D) Long necks. Show Answer Correct Answer: A) Camouflage coloring. 55. The science of grouping and naming organisms A) Phylogeny. B) Dichotomy. C) Genetics. D) Taxonomy. Show Answer Correct Answer: D) Taxonomy. 56. When a very small subgroup of a population forms its own population leading to a change in the genetics of the population. A) Natural Selection. B) Population Bottleneck. C) Founder Effect. D) Genetic Drift. Show Answer Correct Answer: B) Population Bottleneck. 57. A ..... can be used to support evolutionary relationships because the old and extinct specimen can be compared to current living species. A) Vestigial Structure. B) Fossil. C) Bottle Neck effect. D) Natural Selection. E) Homologous Structure. Show Answer Correct Answer: B) Fossil. 58. Structures that were once functional in the past but no longer serve a purpose due to evolutionary adaptations and physiological changes are referred to as ..... structures. A) Homologous structures. B) Analogous structures. C) Vestigial structures. D) None of these. Show Answer Correct Answer: C) Vestigial structures. 59. Scientists who find and study fossils are called ..... A) Paleontologists. B) Ecologists. C) All the above. D) None of the above. Show Answer Correct Answer: A) Paleontologists. 60. A genetically determined characteristic is known as A) Population. B) Fossil. C) Takis. D) Trait. Show Answer Correct Answer: D) Trait. ← PreviousNext →Related QuizzesScience QuizzesClass 12 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books