When tumor suppressor genes mutate, their products
What will be an ideal response?
no longer inhibit the cell cycle
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What helical forms are adopted by double-stranded RNA?
A. There is evidence for B-form RNA in viruses. B. There is no evidence that A-form RNA occurs in cells. C. The A form is the only form found for double-stranded RNA in cells and in viruses. D. There is evidence that Z-form RNA occurs in cells under certain conditions. E. The A form occurs only in the laboratory.
Naegleria fowleri may cause
A. meningitis. B. primary amebic meningoencephalitis. C. African sleeping sickness. D. AIDS.
The FOXP2 sequences of mice were most different from those of
A. gorillas. B. chimpanzees. C. rhesus monkeys. D. All had the same number of changes from the mouse sequence. E. humans.
Nonscientists often use the words "name," "identify," and "classify" interchangeably. When they want to know what an organism is, they may ask "Can you name this?" or "Can you identify this?" or "Can you classify this?" Which of the following is/are correct usage(s) of the term(s)?
A. A farmer using a key to detect pest insect species in his fields is identifying insects but not naming or necessarily classifying them. B. Classifying is grouping, and to classify something requires several organisms so you can group one as closer to a second and distant from a third. C. A scientist who publishes the name and description of a new species must necessarily also know both how to identify and classify the species. D. Only the scientist who first describes a new species actually names it. E. All of the choices are correct.