Plants are raised under artificial lights turned off and on by an electric clock. Some are given long periods of light, others short periods. This is an example of:
A. deductive reasoning
B. a hypothesis
C. an experiment
D. inductive reasoning
E. a theory
Answer: C
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Which of the following is a difference between a viroid and a virus?
A. Viroids are alive and viruses are not. B. Viroids are composed solely of nucleic acid while viruses are composed of nucleic acid surrounded by a protein coat. C. Viroids are not infectious particles and viruses often cause disease. D. Viroids infect only plants while viruses infect only animals and prokaryotes. E. Viroids contain some genes important for their own replication while viruses rely entirely on host cell enzymes for their replication.
48. If a person is treated with a single anti-HIV drug, they often end up with a resistant strain. How does this occur?
A. The HIV wants to avoid the drug, so it becomes resistant. B. The drug causes mutations in the HIV, making them resistant to the drug. C. All of the answer choices are correct. D. The drugs kill all sensitive viruses, leaving only the preexisting resistant viruses. E. The drugs weaken the immune system, making a patient more susceptible to infection with resistant strains of HIV.
As fatigue increases, the risk of injury ______.
a. stays the same b. becomes unavoidable c. increases d. decreases
Thigmotropism
What will be an ideal response?