Cell-mediated immunity in part protects against __________.
A) normal cells of the host, producing the cell-mediated immunity
B) bacteria free in body fluids
C) intracellular bacteria and viruses
D) viruses free in body fluids
E) toxins
Ans: C) intracellular bacteria and viruses
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A. Differential B. Characteristic C. Enrichment D. Selective
When subtropical forest is cleared, what biome is most likely to replace it?
a. grassland suitable for grazing b. cropland ideal for agriculture c. young forest with the same species d. desert with poor eroded soil e. chaparral with grass and low bushes
A 25-year-old woman has just had the Implanon or Nexplanon system inserted for contraception. Six months later, she is concerned because she is not menstruating. This is ________, and the reason is that she has an increased level of ________
A) abnormal; luteinizing hormone (LH) B) normal; progesterone C) normal; estrogen D) abnormal; follicle stimulating hormone (FSH)
Which of the following statements about phospholipids is TRUE?
A) Each one has two fatty acid chains and the glycerol backbone is bonded to a small polar group B) the glycerol backbone is bonded to a small nonpolar group C) Each one has three fatty acid chains D) Their biological function remains unknown