22. Reiji Okazaki discovered what are now called "Okazaki fragments" produced during DNA replication. These fragments are________. (A)short lengths of new DNA on the leading strand (B)RNA primers on the lagging strand (C)RNA primers on both the lagging and leading strand (D) short lengths of new DNA on the lagging strand (E) RNA primers on the leading strand

8. Which statement describes a difference between meiosis I and meiosis II? (A)DNA is replicated during meiosis II but not during meiosis I. (B)Homologous chromosomes separate during meiosis I； sister chromatids separate during meiosis II. (C)Meiosis I produces diploid cells； meiosis II produces haploid cells. (D) Chromosomes align along the equatorial plane of the cell in meiosis I but not in meiosis II. (E) Crossing-over occurs during meiosis II but not during meiosis I.

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