It has been difficult to generate drugs to treat AIDS for which reason?
HIV does not cause AIDS.
HIV does not use any enzymes that can be targeted by drugs.
HIV mutates rapidly.
The only way to kill a virus is with a vaccine, not with drugs.
People with HIV infections die rapidly, before the drugs have a chance to cure them.
HIV mutates rapidly.
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Which of the following types of epithelia would be likely to make up the tubules of the kidney?
A. cuboidal B. squamous C. columnar and squamous D. columnar E. pseudostratified
A common larval form of barnacles is the cyprid larva
Indicate whether the statement is true or false
Which statement about taste receptors is NOT true?
A. Taste receptors are found only on the tongue in animals. B. Taste receptors generate nerve impulses in associated sensory nerve fibers. C. Taste receptors recognize sweet, sour, bitter, salty and umami sensations. D. Taste receptors are chemoreceptors. E. Taste receptors are located within taste buds in humans.
The naive mature B lymphocytes and T lymphocytes develop initially in the bone marrow and thymus respectively. Upon contact with the microbial antigens, these cells differentiate to memory cells among other forms
a. true b. false