Overproduction of organic matter resulting in anoxic conditions is attributed to ________

A) autotrophication
B) eutrophication
C) net primary productivity
D) photoperiodicity
E) phototropism


B

Environmental & Atmospheric Sciences

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Today, the less-developed countries have ________.

A. high death rates and low birthrates B. high death rates and high birthrates C. low death rates and high birthrates D. low death rates and low birthrates

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Which element accounts for the largest percentage of the earth's crust?

A) carbon B) nitrogen C) oxygen D) silicon

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Which biome is home to more plant and animal species than any other?

A) evergreen forest B) grassland C) deciduous forest D) tropical rain forest E) savanna

Environmental & Atmospheric Sciences

A neutral molecule, such as water, can form an ion when it

A. fragments into protons and electrons. B. absorbs electrons and become negatively charged. C. combines with a chloride ion to form a negatively charged species. D. combines with a hydrogen ion to form a positively charged species. E. absorbs electrons and become positively charged.

Environmental & Atmospheric Sciences