Which one of the following accurately describes the lac operon?
a. rna polymerase is prevented from transcribing the lac genes when lactose is present.
b. rna polymerase transcribes the lac genes when lactose isn't present.
c. the repressor protein binds to the operator when lactose is present.
d. the repressor is freed from the operator when lactose is present.

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.