The interaction between panic grass and its endophyte fungus that allows them to grow at 65°C together, but not independently, is an example of
A. commensalism.
B. predation.
C. parasitism.
D. competition.
E. mutualism.
E. mutualism.
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How is the heart rate controlled by the nervous system in an intact organism?
What will be an ideal response?
Transposons
A. are informally known as jumping genes. B. may cause insertion mutations. C. may cause knockout mutations. D. were first recognized in plants. E. All of the choices are correct.
Parasites have often been described incorrectly as having "devolved" from a more highly evolved organism. Why would it be more accurate to say that they are just as evolved as any other organism?
What will be an ideal response?
How would you test to see whether a particular influenza vaccine protects elderly people from influenza?
A. Conclude that elderly people are less likely to be hospitalized or die following vaccination. B. Follow tens of thousands of people over the age of 65 during flu seasons and record illnesses and vaccination status. C. Notice the rise in vaccination rates among the elderly over a period of years. D. Speculate that elderly people who were immunized will have fewer hospital stays and deaths during the winter after vaccination.