An abscess that begins as a red nodule in a hair follicle that ultimately becomes painful and full of pus is a:
a. folliculitis.
b. furuncle.
c. carbuncle.
d. erythrasma.
B
A furuncle or boil is an abscess that begins as a red nodule in a hair follicle that ultimately be-comes painful and full of pus.
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Compared to asexual reproduction, the main advantage of sexual reproduction is that it
A. requires less energy B. increases the genetic diversity of the offspring C. can produce more complex offspring D. can produce a greater number of offspring
Variables that are always different between the experimental and the control groups are
(a) independent. (b) controlled. (c) dependent. (d) a and c.
Which of the following PCR procedures includes all of the others?
A. DNA is reannealed at 50oC B. DNA is denatured at 95oC. C. Primers are extended at 72oC. D. DNA is amplified for one cycle.
Which statement regarding compound eyes is true?
A) They have one light-focusing lens. B) They are poor motion detectors. C) They can provide excellent color vision. D) They can perceive only visible light.