This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 7 Evolution – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 7 Evolution Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. What is a change in a gene pool due to random events? A) Genetic Drift. B) Natural Selection. C) Evolution. D) Speciation. Show Answer Correct Answer: A) Genetic Drift. 3. Population involve not individuals A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 4. A plasmid is A) A type of bacteria. B) A type of archaea. C) A small ring of DNA. D) A virus. Show Answer Correct Answer: C) A small ring of DNA. 5. 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. 6. 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 most likely 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. 7. 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. 8. A diagram that shows how organisms are related to each other A) Cladogram. B) Bracket. C) Punnett square. D) Karyotype. Show Answer Correct Answer: A) Cladogram. 9. 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. 10. 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. 11. 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. 12. 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) Vestigial structure. B) Homologous structure. C) Analogous structure. D) Adaptive structure. Show Answer Correct Answer: A) Vestigial structure. 13. 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. 14. The concept of gene flow is demonstrated when a cow is driven off from its herd, joins another herd, and reproduces. When the cow contributes to the gene pool of the new herd, which of these most likely Increases? A) Natural selection. B) Genetic variation. C) Environmental fitness. D) Reproductive mutations. Show Answer Correct Answer: B) Genetic variation. 15. What role does convergent evolution play in biodiversity? A) Contributes to functional diversity by generating similarities in species that do not share a common ancestor. B) Increases genetic diversity by limiting similarities between species. C) Reduces competition between species by generating marked differences. D) Promotes specialization in a single ecological niche. Show Answer Correct Answer: A) Contributes to functional diversity by generating similarities in species that do not share a common ancestor. 16. Fossil records indicate that species changes generally A) Stop when a species forms. B) Speed up with stable conditions. C) Take place over many generations. D) Are independent of the environment. Show Answer Correct Answer: C) Take place over many generations. 17. What is the study of prehistoric life through the fossil record? A) Embryology. B) Paleontology. C) Morphology. D) Biogeography. Show Answer Correct Answer: B) Paleontology. 18. Which of the following statements supports the idea that fossils can be used as evidence of evolution? A) Ancient organisms were all very different than today's organisms. B) All organisms alive today have left fossil evidence. C) Fossils are often similar, but not identical to, modern organisms. D) Fossils show no differences to modern organisms. Show Answer Correct Answer: C) Fossils are often similar, but not identical to, modern organisms. 19. Which of the following best describes natural selection? A) A process where organisms better adapted to their environment tend to survive and produce more offspring. B) A random change in allele frequencies in a population. C) The movement of individuals into or out of a population. D) The formation of new species from existing species. Show Answer Correct Answer: A) A process where organisms better adapted to their environment tend to survive and produce more offspring. 20. Study of embryos and their development A) Embryology. B) Variation. C) Vestigial structures. D) Common ancestor. Show Answer Correct Answer: A) Embryology. 21. Insect resistance of pesticides is caused by A) Insects learn how to avoid the pesticides. B) Only the resistant insects survive to reproduce. increasing the allele frequency of the tough. C) Insects are able to absorb the pesticide after repeated exposure. D) Insects avoid the pesticide. Show Answer Correct Answer: B) Only the resistant insects survive to reproduce. increasing the allele frequency of the tough. 22. Which of the following is true of evolution? A) Individuals evolve, populations do not. B) Individuals evolve; individuals do not. C) Traits like scars and long hair are passed on to offspring. D) Individuals evolve more slowly than populations. Show Answer Correct Answer: B) Individuals evolve; individuals do not. 23. Which part of the theory of evolution did Darwin develop after reading Thomas Malthus? A) Evolution occurs as advantageous traits accumulate in a population. B) In any population, there is variation and unequal ability to individuals to survive and reproduce. C) Only the best-fit individuals survive and get to pass on their genes. D) Populations tend to grow exponentially, overpopulate, and exceed their resources. Show Answer Correct Answer: D) Populations tend to grow exponentially, overpopulate, and exceed their resources. 24. What characteristic did Darwin observe about the finches on the Galapagos Islands? A) Their feathers. B) Genotypes. C) Their beaks. D) Their body sizes. Show Answer Correct Answer: C) Their beaks. 25. Fixed and known value A) RADIUM-STRINTIUM DATING. B) Half Life. C) Decay Rate. D) Samarium-Neodymium Dating. Show Answer Correct Answer: B) Half Life. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 7 Evolution Quiz 1Class 12 Biology Chapter 7 Evolution Quiz 2Class 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 10Class 12 Biology Chapter 7 Evolution Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books