An infectious RNA molecule is a
A. virion.
B. bacteriophage.
C. virus.
D. prion.
E. viroid.
E. viroid.
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Based on the answer to the previous question, what phenotypic ratio of red and orange eyes is predicted in the offspring of the F1 male (orange eyes) and female (red eyes)?
A: 3/4 red eye & ¼ orange eye for both sexes. B: ½ red eye & ½ orange eye for both sexes. C: All red eye males; ½ red & ½ orange females D: All red eye females; ½ red & ½ orange eye males
A friend asks you for a definition of endemic because she is writing a history paper and this word keeps occurring in the literature in reference to bison on the Great Plains of the United States. Your response is that the word endemic means
A. a species that has coevolved with humans on Earth. B. a species that lives in only one area of Earth. C. a species that has gone extinct since humans have evolved on Earth. D. a species that exists in many habitats on Earth.
Which term describes an elevated body temperature that fluctuates, but doesn't reach normal in the course of the fluctuations?
A) remittent fever B) intermittent fever C) Pel-Ebstein fever D) relapsing fever E) sustained fever
A cyclist rides her bike up a very steep hill. Which statement properly describes this example in energetic terms?
A) Potential energy is highest when the cyclist just begins to ascend the hill. B) The cyclist produces the most potential energy as she cruises down the hill's steep slope. C) Gravity provides a source of kinetic energy. D) Potential energy in food is converted to kinetic energy as the cyclist's muscles push her up the hill. E) Kinetic energy is highest when the cyclist is at the crest of the hill.