The ____ has/have a low ratio of volume in comparison to its area in the ocean
a. Continental shelves
b. Submarine canyons
c. Continental rises
d. Deep ocean floor
ANS: D
The deep ocean floor covers 78% of the ocean's area. Despite the massive area it covers, the deep
ocean floor only consists of 13% of the volume of marine sediments. Information can be found in the
section Sediments May be Classified by Source.
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Describe the arrangement of neighborhoods in a typical African city
What will be an ideal response?
DDT, DDE, PCBs, and PBDEs are all ________
A) non-biodegradable and subject to bioaccumulation and/or biomagnification B) biodegradable and do not persist in the environment C) toxic at the organism level but not at the ecosystem level D) teratogens E) approved for use as pesticides by the EPA
The anticancer drug fluoruracil functions by inhibiting the synthesis of which DNA nucleoside?
A) deoxyadenosine B) deoxyguanosine C) deoxythymidine D) deoxycytidine
Our seasons are caused by
a. ?the amount of cloud cover during the different parts of the year. b. ?the angle at which sunlight reaches Earth. c. ?the proximity to the poles. d. ?the constellation of Earth, Sun, and Moon. e. ?differences in altitude.