Which of the following is NOT true of lipids?
a. They store energy.
b. They function as structural components of cellular membranes.
c. They function as hormones.
d. They are nonpolar.
e. They have many oxygen-containing functional groups.
E
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Which of the following best represents analogous structures?
A. the arm of a human and the leg of a human B. the wing of a bat and the wing of a butterfly C. the arm of a human and the wing of a bat D. the wing of a butterfly and the wing of a bee
Spallanzani's experiment was criticized because
A. he did not thoroughly sterilize his equipment. B. he did not have a control group. C. he sealed half of his containers, thereby excluding air. D. his sample size was small.
In the phosphorus cycle the ultimate source of phosphorus is
A. rock. B. dead organisms. C. plants. D. the sun.
This pathogen is the most common cause of neonatal pneumonia, sepsis, and meningitis in the United States:
A. Staphylococcus aureus B. Staphylococcus epidermidis C. Staphylococcus saprophyticus D. Streptococcus pyogenes E. Streptococcus agalactiae