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Test Bank for Marine Biology: Function, Biodiversity, Ecology 2E - page 44 / 44

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d. They are thought to be correlated in abundance with other microorganisms that cause disease

Tertiary sewage treatment would involve

a. The removal of very fine particulate matter

b. Removal of dissolved nutrients

c. Removal of heavy metals

d. Removal of oxygen

The greenhouse effect of the earth's atmosphere

a. Is caused by industrial emissions only of methane

b. Is caused only by carbon dioxide that is derived from industrial emissions

c. Is caused by natural sources only of carbon dioxide and other natural gases such as methane

d. Is caused by carbon dioxide and other gases from both natural and industrial sources

Secchi disk data show

a. A strong rise in phytoplankton abundance over the last 70 years

b. No change in temperature over the past 70 years

c. An increase in temperature over the past 70 years

d. No change in phytoplankton abundance over the last 70 years

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