You need to explain to your study group why the breathing ability of amniotes is different than that of amphibians. Your classmates argue that something like a terrestrial salamander is identical in its breathing mechanism to an amniote. To convince them of the critical breathing innovations of amniotes, you report that in order to breathe as an amniote does, the terrestrial salamander would have to
A. grow scales on its body.
B. develop new muscular associations in the ribcage.
C. grow lungs.
D. reduce the size of its mouth.
B. develop new muscular associations in the ribcage.
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A direct immunofluorescent antibody (DFA) test was performed on a sputum sample that yielded a positive test. The organism grew on BCYE medium and was a thin gram-negative, faintly staining bacillus. What is the drug of choice for this organism?
a. Fluoroquinolones b. Erythromycin c. Penicillin d. Aminoglycosides
Which structure(s) grow(s) just in front of animal tissues where only the Hoxc6 geneis expressed?
a. forelimbs and hindlimbs b. hindlimbs only c. ribs only d. forelimbs only e. forelimbs and ribs
The difference between climate and weather is that
A) weather is limited to precipitation and wind. B) climate is the long term pattern of weather. C) climate is limited to temperature. D) weather is a measure of climate.
Which metabolic waste product is so toxic it must be converted into other forms before the kidney can excrete it?
a. urea b. carbon dioxide c. ammonia
d. oxygen e. electrolytes