Which below is an assumption of the single-cell model of the general circulation of the atmosphere?
a. ?Earth's surface is uniformly covered with water.
b. ?Earth rotates once in 24 hours.
c. ?Excessive heating of the equatorial area produces a broad region of surface high pressure, while at the poles excessive cooling creates a region of surface low pressure.
d. ?Prevailing winds in middle latitudes blow from east to west.
e. ?The regions over the poles are referred to as doldrums.
ANSWER: a
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Figure 3.15 Generalized pyramid of energy flow showing the decrease in usable chemical energy available at each succeeding trophic level in a food chain or food web.
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Use the accompanying figure to answer the following five questions.
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Why would there be fewer organisms at level A than at any level below it?
What will be an ideal response?
________ are materials that are good indicators of the metamorphic environment in which they formed and can be used to distinguish between various zones of metamorphism
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