After a week of asymptomatic infection with Bordetella pertussis, the patient has cold-like (catarrhal) symptoms for a week or two followed by a period of severe paroxysmal episodes of coughing that leave the patient anoxic and fatigued.
Answer the following statement true (T) or false (F)
True
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A hybrid zone is defined as an area where two populations may breed and produce ____
a. inviable, sterile offspring b. viable host races c. inviable hybrid subspecies d. viable, fertile offspring e. viable, sterile offspring
Target tissues for steroid hormones and thyroid hormones do not have membrane receptors for these
hormones because they
a. stimulate the cell by changes in electrical activity. b. are water soluble. c. enter the cell by ion channels. d. are small enough to diffuse directly into the cell. e. are soluble in the lipid bilayer.
A stamen is ____
a. composed of a stigma, a style, and an ovary b. the mature male gametophyte c. composed of an anther and filament d. part of the vegetative phase of an angiosperm e. the structure that gives rise to the female gametophyte
Shawfiq must have a benign tumor removed from his brain. The surgeon tells him that only local anesthesia will be administered as she cuts through Shawfiq's scalp and that he will remain conscious the whole time
Shawfiq is really nervous about this because the brain seems to be a very sensitive area to have surgery on, particularly while he is wide awake. Explain to him why he shouldn't be so nervous.