Human expansion can lead to altered marine ecosystems by ________.
A. conserving biodiversity
B. surveying marine species
C. reducing incidental bycatch
D. introducing new species
Answer: D
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Intraregional migration in the United States has slowed recently because of
A) lifestyle choices. B) the economic recession. C) a desire for detached houses with private yards. D) job growth in urban centers. E) a counterurbanization trend.
Flying by Pluto in July 2015, NASA's New Horizons spacecraft transmitted images of a complex landscape called Sputnik Planum. Which of the following best describes Sputnik Planum?
A) A large ice field with tongues of flowing ice B) A large volcanic field with lava flows composed of frozen methane C) A field of overlapping impact craters D) A landscape shaped by flowing water
Which atmospheric phenomenon below is produced by the diffraction of light around small water droplets?
a. ?halo b. ?inferior mirage c. ?corona d. ?Heiligenschein e. ?sun pillar
Scientists have found that the number of organisms in marine refuges that do not allow fishing is not appreciably different from surrounding areas where fishing is allowed.
Answer the following statement true (T) or false (F)