AP Biology Exam 2021 OVER 100 QUESTIONS AND ANSWERS GRADE A

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AP Biology Exam 2021 Section I (Multiple-Choice Questions) Time: 80 minutes 100 questions Directions: Each of the following questions or statements is followed by five possible answers or se... ntence completions. Choose the one best answer or sentence completion. • In which of the following are the nuclear activities most opposite? • prophase and metaphase • prophase and anaphase • prophase and telophase • metaphase and anaphase • metaphase and telophase • A severe storm forms a new river that divides a population of mice. After 500 years, a drought causes the river to dry up, allowing the two populations of mice to mix. Mating between mice from the two populations does not yield any offspring. This is an example of • hybridization • adaptive radiation • balanced polymorphism • allopatric speciation • sympatric speciation • DNA replication requires all of the following EXCEPT: • primase • helicase • DNA polymerase • topoisomerase • small nuclear ribonucleoproteins (snRNPs) • • A rare genetic defect is characterized by mucus accumulation in the respiratory passages and immotile, but flagellated sperm. A defect in which of the following molecules could be responsible? • actin • myosin • dynein [Show More]

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