Which molecule passes through a lipid bilayer most readily?
A. K+
B. glucose
C. arginine
D. RNA
E. carbon dioxide
Answer: E
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A cerebrospinal fluid (CSF) culture was performed on a newborn in distress. After overnight incubation, small gram-positive bacilli with a soft zone of <-hemolysis grew on sheep blood agar. Based on this information, what results would be expected on the following tests: hippurate; Christie, Atkins, Munch-Petersen (CAMP); and motility?
a. Negative hippurate, positive CAMP, and negative motility b. Positive hippurate, negative CAMP, and positive motility c. Positive hippurate, positive CAMP, and positive motility d. Negative hippurate, negative CAMP, and negative motility
If valuable solutes were not adequately reabsorbed from filtrate, what would occur?
A) The excretion process could not be completed. B) The solutes would be excreted. C) The filtration process could not be completed. D) The solutes would be reabsorbed.
Why is a woman more likely to experience bladder infections than a man?
A) The urethra and vagina are separate openings into the body. B) The urethra is shorter in a woman than in a man. C) The urethra is longer in a woman than in a man. D) The acidity of the urine makes women more susceptible to infections.
Why are gymnosperms no longer restricted to moist environments, as are ferns and mosses?
A) Because they have a new adaptation, seeds, that allow gametes independence from water B) Because they have a new adaptation, cones, that group gametes together C) Because they have a new adaptation, vascular tissues, that allow for the transport of water D) Because they have a new adaptation, lignin, that allows better transportation of water