Porphyritic rocks are interpreted to have formed ___
a) under water
b) in mountain ranges
c) along mid-ocean ridges
d) in chill zones
e) through two or more stages of crystallization
Answer: e) through two or more stages of crystallization
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Which of the following is NOT a criterion for inclusion as a UNESCO World Heritage site?
A) exhibits high potential to be commercialized B) represents a masterpiece of human creative genius C) represents a unique or exceptional living civilization D) represents a unique or exceptional disappeared civilization E) illustrates a significant stage in human history
According to Malthus, population increases geometrically, while food supply increases arithmetically. What was the basis for this argument?
What will be an ideal response?
The most stable predator-prey relationships typically involve communities in which there are
A) many prey species and several natural predators. B) many species of carnivores eating each other. C) only bottom-up population regulation. D) only top-down population regulation.
Composite volcanoes are often composed of:
a. basaltic lavas b. andesitic lavas c. rhyolitic lavas d. gabbroic lavas