What factors are necessary for plankton productivity and therefore determine where productivity is high and where it is low?
Phytoplankton need light and nutrients like nitrogen and phosphorus. Light limits growth in the polar regions during winter, but upwelling of nutrient-rich water increases productivity wherever it occurs-- such as along coastlines.
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Cyclone
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The following questions refer to the above illustration of a middle-latitude cyclone. The dashed lines show the positions of the fronts six hours ago.
In which direction will the storm system apparently move?
A. northeast B. southeast C. east D. northwest
Use of a natural resource based on sustainable yields is most applicable to the idea of ____.
A. nonrenewable resources B. renewable resources C. shared resources D. amenable resources E. recycling
The phenomenon of _______________ is actually a shock wave created by rapidly expanding air
Fill in the blank(s) with correct word
Developing low pressure areas in mid-latitude cyclones generally have ____________________ air near the surface and ____________________ air aloft
Fill in the blank with correct word.