Which of these statements regarding biogeography is false?
A. Closely related species tend to be found close together, suggesting they evolved in one place and then spread.
B. Island species are usually most closely related to species found on the closest mainland.
C. Islands tend to be occupied by many land animals, but few or no flying ones.
D. Despite their similarities, new world tropical forests and old world tropical forests are occupied by different sets of living organisms.
Answer: C
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Given the following information determine which of these acids is the weakest? Ka for boric acid is 7.3 x 10^-10 pKa of acetic acid is 4.75 Ka for lactic acid is 8.4 x 10^-4 pKa of phenol is 9.89
A) acetic acid B) formic acid C) lactic acid D) phenol
Which of the following best describes a knot (unit)?
A) wind direction from due north equal to 0°/360° B) a unit of speed equal to one nautical mile (1.85 km) per hour C) a unit of solar radiation received at top of Earth's atmosphere, equal to 1370 watts per square meter D) a unit of atmospheric pressure equal to 1013.2 mb E) a unit of length equal to 300 mm
Recent work by taxonomists at the World Register of Marine Species has eliminated how many previously listed species because they were duplicate identities?
A) Between 100,000 and 150,000 B) Between 150,000 and 200,000 C) Between 200,000 and 250,000 D) Between 250,000 and 300,000 E) More than 300,000
Which of these is an example of global warming?
A) a record-breaking high temperature in Iowa on a certain day in August B) a measurement of carbon dioxide that is higher than all previous measurements C) a year with more extreme weather incidents than average D) a higher average frequency of hurricanes over a period of 30 years