Which one of the following causes the most severe illness in humans, with a mortality rate of 30 percent?
A) western equine encephalitis
B) eastern equine encephalitis
C) St. Louis encephalitis
D) California encephalitis
E) West Nile encephalitis
B
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Concerning the sex chromosomes, which of the following is correct?
a. The Y chromosome carries a greater number of nonsexual traits. b. X and Y are different in size but carry nearly equal numbers of genes. c. The X chromosome carries more genes for nonsexual traits. d. The X chromosome carries only gender-related genes. e. The X chromosome carries the SRY gene.
The __________ realm has long been separated from other land masses and is the area in which
marsupials are particularly common. a. Ethiopian b. Palearctic c. Nearctic d. Oriental e. Australian
What information is used to calculate the age-specific fertility rate, mx?
A. total number of offspring born to females within a reproductive age class B. number of female offspring born to females within a reproductive age class C. the per capita growth rate of all females D. the net reproductive rate of females E. the average age of first reproduction for females
Atherosclerosis is characterized by
a. increased circulation to the heart b. larger muscles c. a narrowing of the inner walls of coronary arteries due to buildup of fatty materials d. a widening of inner walls of blood vessels as a result of a heart attack