Which of the following statements about ocean productivity is true?
A) Productivity decreases in upwelling zones because the colder temperatures of the waters slow the process of photosynthesis.
B) Sunlight and the availability of nutrients are two factors that regulate ocean productivity.
C) Ocean productivity is highest in the aphotic zone.
D) Limestone (calcium carbonate) is the source of carbon that enters the marine food web.
C
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Severe thunderstorms are capable of producing:a
large hail b. tornadoes c. flash floods d. all of the above
Periodic freezing and thawing of the upper ground surface when the weather is cold can lead to _______
Fill in the blank(s) with correct word
Which side of a forest is at greater risk of wildfire in the northern U.S. and southern Canada?
a. northeast b. southeast c. northwest d. southwest e. south
Why would construction businesses find eskers to be economically important?
A) They provide flat areas for transportation routes. B) They provide nutrient-rich farmland. C) They provide easy access to water sources. D) They provide easily accessible sand and gravel deposits.