The Gulf of Mexico's dead zone is caused by high levels of ____ in the Mississippi River.

A. coliform bacteria
B. phytoplankton
C. plant nutrients
D. algae
E. cyanobacteria


Answer: C

Environmental & Atmospheric Sciences

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A) habitat B) niche C) selection D) distribution E) place in the food chain

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Which carbon is the site of reaction when glucose reacts to form a glucoside?

A) C-1 B) C-2 C) C-5 D) C-6

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A scientist at a canyon notices observes a dike cuts across the sedimentary layers. How did it get there?

A) It was there before the layers; the layers built upon above and beneath it over millions of years. B) There was an earthquake ? a layer of igneous rock was thrust into the sedimentary layers.. C) Magma rose from within the earth and intruded the sedimentary layers. D) A piece of a volcano broke off beneath the earth..

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Capillary water is held in the soil against the pull of gravity by surface tension and hydrogen bonding

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences