Which carbon reservoir contains the most carbon?
a. atmosphere
b. biomass on land
c. lakes
d. oceans
e. soil
ANSWER: d
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A patient with a bacteremia identified as E. meningoseptica infection was placed on intravenous penicillin; however, the patient did not improve after 5 days. Which one of the following state-ments explains these findings?
a. The dose was abbreviated and therefore did not have time to work. b. The patient is most likely allergic to peni-cillin and is not responding. c. Penicillin is ineffective against this or-ganism. d. An aminoglycoside should be given along with the penicillin to increase its effects.
Which of the following structures allows a bacterium to propel itself through its environment?
a. microfilaments b. intermediate filaments c. microvillus d. flagellum e. microtubule
Which vitamin can be synthesized by the body?
What will be an ideal response?
Molecular data confirm that cnidarians branched off from the rest of animals before ________ evolved.
A. mollusks B. bilateral symmetry C. Porifera D. arthropods E. echinoderms