cIn the spiral staircase model of DNA, the handrails
are
a. covalent bonds.
b. hydrogen bonds.
c. nucleotide base pairs.
d. phosphate and deoxyribose groups.
e. composed of all of these.
Answer: d
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Once a probe has hybridized with a gene of
interest in a DNA library, how is the hybrid identified?
a. by its sticky tail b. by its radioactive phosphate group c. by using restriction enzymes d. by centrifugation e. by vector analysis
Demographic studies include all of the following except what?
A. age structure B. growth rates C. mortality and survivorship curves D. sex ratio E. measurements of interspecific competition
When you need to go to a hospital for a surgery, you should ________
A) pick the nearest hospital for convenience B) trust the nurses and doctors there because medical errors in hospitals are very rare C) go to a hospital that is known to have success in treating your medical condition D) relax and try to avoid asking questions
What is TRUE about the settlers of Easter Island?
a. The settlers traveled 2000 km across the ocean to arrive there. b. The population of the island peaked at 100,000 people. c. People were already living there when the settlers from Polynesia arrived. d. The island had been settled repeatedly over the years, but nobody stayed until the 1700s.