What is RNAi?
What will be an ideal response?
RNAi (RNA interference) is a form of gene-expression regulation in which double-stranded RNA molecules act, through various intermediates, to degrade mRNAs.
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Which of the following statements is true regarding the sexual life cycle of ascomycetes? Select all correct choices
A. Spore precursor cells undergo meiosis and mitosis to form spores. B. Spore precursor cells only undergo meiosis to form spores. C. Spore precursor cells only undergo mitosis to form spores. D. Fruiting bodies are composed of both haploid (1n) and dikaryotic (n+n) cells. E. Fruiting bodies are only composed of dikaryotic cells (n+n).
A Barr body exists for the purpose of
a. protein dosage compensation. b. insuring fertilization. c. blocking the activity of the Y chromosome. d. turning on the SRY gene. e. activating master genes
"Two out of three times, they will pass on the trait." This is a statement of
A. probability. B. possibility. C. certainty. D. confusion.
Evidence suggests that the crocodiles are more closely related to the birds than the turtles and snakes. If so, then including crocodiles, but not birds, in the Class Reptilia would make the Class Reptilia
A. a paraphyletic group. B. parsimonious. C. a polyphyletic group. D. a monophyletic group. E. not homologous.