The loss of color (coral bleaching) in coral reef organisms can be a result of ________
A) crown-of-thorn sea stars
B) fungal parasites
C) increased sediment loads
D) increase in zooxanthellae concentrations
E) loss of zooxanthellae
E
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Which of the following types of sewage treatment are properly matched?
A. primary-physical process B. secondary-physical process C. primary-biological process D. secondary-chemical process E. primary-chemical process
Humid air is more dense than dry air at the same temperature. Indicate whether the statement is true or false
What happens to a mountain root as erosion removes material from the summit?
A. It stays the same. B. It gets deeper. C. It gets shallower.
Greenways are strips of land that
a. connect parks and neighborhoods. b. often run along rivers and streams. c. provide corridors for the movement of wildlife. d. All of the above are correct.