MODULE 3 TICA & IKE, Questions with accurate answers, 2022/2023. Rated A

Document Content and Description Below

MODULE 3 TICA & IKE, Questions with accurate answers, 2022/2023. Rated A Which of these factors are required for biological evolution to occur? Select all that apply. genetic variation in the ... population natural selection variation in acquired traits among individuals in the population a large population many generations - ✔✔genetic variation in the population What did Darwin propose in his theory of evolution? A. Species evolve by natural selection B. Currently existing species share a common ancestor C. Evolution occurs by sudden occurrence of many heritable changes D. All of these. E. A and B. - ✔✔E. A and B. How does a scientific theory differ from a scientific hypothesis? - ✔✔A theory is an overall explanation for a major phenomenon or observation and includes hypotheses; hypotheses treat more specific observations. Which of the following is NOT true of evolution? A. Evolutionary relationships determined by the geological record generally do not match evolutionary relationships determined by gene sequence comparisons B. Only populations can evolve; individual organisms cannot evolve C. The gene pool of a species may containe alleles that are not useful now in anticipation of a time when changing environmental conditions will make them useful D. Changes in the environment induce (cause) new adaptive (helpful) heritable variation among individuals in the population E. Natural selection does not always result in an ideal fit between an organism and its environment - ✔✔A, C and D What will happen to a population of snakes if the small mice they normally eat are no longer available and all that is left are larger rats that are more difficult to swallow? - ✔✔The individual snakes that already have slightly wider jaws that allow them to eat rats would be more likely to survive and reproduce. How does natural selection explain how bacterial populations evolve resistance to antibiotics? - ✔✔rare, resistant mutant bacteria in the population survive antibiotic treatment What conditions lead to evolution by natural selection? A. unlimited resources B. competition for limiting resources C. heritable variation in the population D. large population - ✔✔B and C Which of the following statements is/are accurate? Natural selection works on variation already present in a population. Evolution by natural selection results from selection on both heritable and non-heritable traits. Individuals evolve through natural selection. Organisms evolve structures that they need. - ✔✔Natural selection works on variation already present in a population. Which statement describes the canary with the greatest biological fitness? A. canary that lives to be 3 years old and has four offspring, two of which survive to reproduce themselves B. canary that lives to be 5 years old and has five offspring, one of which survives to reproduce C. canary that lives to be 2 years old and has four offspring, all of which survive to reproduce themselves D. canary that lives to be 7 years old and has three offspring, all of which survive to reproduce - ✔✔C. canary that lives to be 2 years old and has four offspring, all of which survive to reproduce themselves Selection that results in a shift in the population toward one extreme phenotype is best described as Disruptive Stabilizing Balancing Directional - ✔✔Directional Which mechanism(s) of evolution always increase(s) fitness and leads to adaptation? Natural selection Mutation Gene flow Genetic drift Sexual selection - ✔✔Natural Selection [Show More]

Last updated: 3 years ago

Preview 1 out of 7 pages