Which isolate of Ebola does not cause illness in humans?
a) Zaire
b) Sudan
c) Marburg
d) Reston
Answer: d) Reston
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When the predator population is above the prey isocline, the prey population is
a. increasing b. decreasing c. neither increasing nor decreasing
HIV is a
A. double-stranded DNA virus. B. single-stranded RNA virus. C. single-stranded DNA virus. D. double-stranded RNA virus. E. prion.
When signal molecules bind to two tyrosine kinase receptors, the receptors move closer to each other and form a
monomer. __________________ Indicate whether the statement is true or false.
The advantage of being able to clone the gene for human insulin is that
A) there are too few cows, pigs, and horses to provide an adequate supply of their insulin. B) human insulin is less likely to cause harmful side effects than cow, pig, or horse insulin. C) cow, pig, or horse insulin cannot keep a diabetic alive for more than 3 months. D) using human insulin increases the probability that, in the future, the person suffering from diabetes can be weaned from a dependence on insulin.