Which virus can cross the placenta and affect the fetus, causing spontaneous abortion or serious fetal damage?
a) HIV
b) HSV
c) HPV
d) HBV
Ans: b) HSV
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The "Anthropocene Period":
A. is so named to reflect the impact of humans on the planet. B. is Latin for "modern era." C. refers specifically to the period of time following the industrial revolution. D. is so named to reflect increasing global surface temperatures. E. refers to the period when the earliest primate ancestors appeared in the fossil record.
Callose has what effect on pollen?
A. aids differentiation and attachment of pollen to the carpel B. aids pollen development and helps pollen tubes to grow C. aids pollen coat development D. aids pollen coloration E. aids the separation of pollen grains from the anther
The variation of the color in Siamese cats is due to
a. incomplete codominance. b. inactive X chromosomes. c. environmental effects on phenotypes. d. quantitative inheritance. e. multiple alleles.
Antimicrobics that are macrolides
A. disrupt cell membrane function. B. include azithromycin, clarithromcyin, and erythromycin. C. include tetracyclines. D. are hepatotoxic. E. are very narrow-spectrum drugs.