A patient complaining of watery, itchy eyes and sneezing after being given a flower bouquet as a birthday gift should first be treated with _____
A) a vaccine
B) complement
C) sterile pollen
D) antihistamines
E) monoclonal antibodies
Answer: D
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Chemical selection occurs....
A. when a catalyst speeds up a process that would normally occur at a slower rate. B. when covalent bonds are formed between two previously unlinked molecules. C. when a chemical within a mixture has special properties or advantages that cause it to increase in number compared to other chemicals in the mixture. D. during the ribozymic phase of coacervate formation. E. after the formation of a membrane and when the DNA is replicated and transcribed.
What is the main difference between habituation and conditioning?
A. Habituation involves learning, while conditioning does not. B. Habituation involves genetic imprinting, while conditioning involves only learned behavior. C. Habituation involves a stimulus with no association, while conditioning involves a stimulus with an association. D. Habituation involves an increase in the intensity of response, while conditioning involves a decrease in intensity of response. E. Habituation lacks an external stimulus, while conditioning involves both external and internal stimuli.
What is one piece of evidence that supports the hypothesis that cancers are clonal?
What is one piece of evidence that supports the hypothesis that cancers are clonal? A) A tumor grows in a single anatomical site. B) All cells from the same cancer have identical mutations. C) All cells from the same tumor have identical karyotypes. D) All cancer cells from a heterozygous woman have the same X chromosome inactivated. E) Individuals of all ages, including children, can develop cancer.
Which of the following statements is incorrect concerning the use of drug therapy in an HIV-positive patient?
A) If drug therapy is used in a confirmed HIV-positive patient, all HIV viruses can be successfully eliminated from the body. B) Protease inhibitors can slow the assembly of new viruses. C) Reverse transcriptase inhibitors can help to slow the virus from entering into host chromosomes. D) Two or more drugs can be combined to form a "drug cocktail."