Which of the following is true of the structure
labeled "B"?
a. It is composed of tubulin subunits.
b. It is composed of actin subunits.
c. It is a microtubule.
d. It is an intermediate filament.
e. It is found in cells that give rise to nails and
hair.
B
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Considering the global carbon cycle, where are humans having a great impact?
I) terrestrial ecosystems II) oceans III) atmosphere A) only I B) only II C) only III D) only I and III E) I, II, and III
Compare aerobic respiration and fermentation in terms of
(a) efficiency of obtaining energy from glucose (b) end products
Which digestive structure will store and concentrate bile?
a. Gallbladder b. Small intestines c. Liver d. Anus e. Salivary glands
The most common NGU in the United States is treated with
A) penicillin. B) cephalosporins. C) acyclovir. D) AZT. E) doxycycline.