The species area relationship concept suggests that if 90% of a coral reef is lost
a. 90% of the species utilizing the reef will go extinct.
b. 100% of the species will go extinct.
c. 50% of the species will go extinct.
d. 35% will go extinct.
e. There will be no loss of species.
C
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A) trend B) persistence C) climatology D) analog E) numerical
Where are earthquakes and volcanoes most commonly found?
A) in the higher latitudes B) at the edges of oceans C) along tectonic plate boundaries D) around the equator E) The location is random.
The mass of an atom of 12C is exactly 12 atomic mass units. Which of the following describes a mole of 12C atoms?
A) a sample which weighs exactly 12 atomic mass units B) a sample which contains 6.02 x 10^23 atoms of 12C C) both a and b D) neither a nor b
Which layer of the planet forms 80 percent of Earth's total volume, and has an average density of 4.5 grams/cm3?
A) continental crust B) oceanic crust C) mantle D) core