Four of the five cells listed below are targets of the
immune system. Select the exception.
a. viruses
b. cells with MHC markers
c. cancer cells
d. bacteria
e. dead cells
Answer: b
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In mammals, the brain region that has become especially important as a "relay center" for information passing from sensory structures to the cerebrum is the
A. pons. B. cerebellum. C. hypothalamus. D. thalamus. E. hippocampus.
Consider the following hypothetical situation. Researchers doing influenza surveillance involving molecular analysis of recent isolates of the virus notice a major change in the H and N antigens. What is a likely outcome?
A. The number of cases of influenza will increase significantly. B. The number of cases of influenza will decrease significantly. C. There will be no significant change in the number of cases of influenza.
Which group is made up of almost exclusively decomposers?
a. plants b. fungi c. animals d. bacteria e. protists
Which H+ ion has just passed through the inner mitochondrial membrane by diffusion?
A) hydrogen ion A B) hydrogen ion B C) hydrogen ion C D) hydrogen ion D E) hydrogen ion E