Refer to the accompanying figure. Which structure is the source of sebum, a substance that inhibits bacterial growth on the surface of the skin?
a. 5
b. 7
c. 10
d. 11
e. 12.
c
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A 28-year-old woman suspected of having sepsis caused by G. vaginalis has multiple blood cultures drawn; however, all sets were negative. Which one of the following statements explains this discrepancy?
a. The lot of blood culture media is most likely defective. b. The blood culture bottles should be incu-bated anaerobically to enhance the growth of the organism. c. G. vaginalis is inhibited by sodium po-lyanethol sulfonate (SPS) in the blood culture. d. No discrepancy is present. G. vaginalis remains localized and does not cause sep-sis.
In his study of the Mediterranean fruit flies (Ceratitis capitata), Matthew Gage (1991 ) found that ________
A) males allowed to mate alone produced 2 1/2 times more sperm than those mating in the presence of other males B) males allowed to mate alone produced 2 1/2 times less sperm than those mating in the presence of other males C) males produced the same amount of sperm when they were allowed to mate alone or when they mated in the presence of other males D) males engaged in aggressive behavior when mating in the presence of other males
Complications in constructing phylogenetic trees due to reversals and convergent evolution are known collectively as ________
Fill in the blank(s) with correct word
The two body systems that play the largest role in animal behavior are:a
reproductive and digestive. b. reproductive and endocrine. c. nervous and reproductive. d. nervous and endocrine. e. reproductive and muscular