A vertical migration of plankton is responsible for mixing nutrient-rich deep water with the nutrientpoor
surface water. Indicate whether the statement is true or false.
ANS: T
This migration is also calm turbulence. These plankton can migrate up and down the water column
about 100 meters every day. Information can be found in the section Zooplankton Consume Primary
Producers.
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The number of people or animals that can be supported indefinitely by a given area of land is called
____. a. carrying capacity b. growth rate c. doubling time d. population dynamics e. critical mass
Sedimentary facies of the Gulf Coastal plain developed primarily in response to ____
a. transgression of the Zuni sea b. regression of the Zuni sea
c. transgression of the Tejas sea d. regression of the Tejas sea e. regression of the Gulf of Mexico
You should stay away from windows if you see an approaching tornado because
A) flying debris is the primary cause of tornado injuries, and glass debris is particularly dangerous. B) opening the windows makes the house more susceptible to damage caused by the pressure differences associated with a tornado's passage. C) opening the windows would allow the extreme tornadic winds to push inward against the walls and collapse the building. D) keeping the windows closed is the best way to equalize the indoor and outdoor pressure during a tornado's passage.
Paleomagnetism helps scientists understand ____
a. the origin of Earth's magnetic field b. the crust's chemical composition c. the past location of continents d. the depth of the Mohorovi?ic´ discontinuity e. Earth's age