Which of the following statements regarding the black widow spider is correct?
A) The venom of a black widow spider contains a necrotoxin, which results in local tissue necrosis.
B) Because the mortality rate from a black widow spider bite is about 40%, a prehospital antidote is crucial.
C) Following a black widow spider bite, the patient's abdomen is often rigid due to severe muscle spasms.
D) The male black widow spider, which is the sex that poses a danger to humans, contains a red hourglass on its back.
Answer: C) Following a black widow spider bite, the patient's abdomen is often rigid due to severe muscle spasms.
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List some regions of the U.S. where there are significant populations living on alluvial fans. Why is it dangerous to build there?
What will be an ideal response?
What are the three economically strongest countries in Latin America, accounting for 80% of the region's manufacturing output?
a. Cuba, Venezuela, and Mexico b. Brazil, Argentina, and Mexico c. Brazil, Chile, Panama d. Brazil, Mexico, Honduras e. Mexico, Guatemala, Ecuador
Map projections do not have to deal with nor consider scale
Indicate whether this statement is true or false.
Compared with a slope in a humid area, a slope in a drier area nearby is more likely to be
A. more jagged, because uplift is more likely to be outpacing erosion. B. less jagged, because uplift is more likely to be outpacing erosion. C. more jagged, because erosion is more likely to be outpacing uplift. D. less jagged, because erosion is more likely to be outpacing uplift.