Where is phytoplankton the most productive?
a. Tropical latitudes
b. Temperate latitudes
c. North polar latitudes
d. Equator
ANS: B
The most primary productivity occurs at the temperate and southern subpolar regions. This is due to
plenty of dependable sunlight and moderate nutrient supply. Information can be found in the section
Phytoplankton Productivity varies with Local Conditions.
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The traits that characterized the now generally rejected classification of ________ are not place specific
A) ethnicity B) race C) nationality D) citizenship E) voting rights
The Berlin Wall and the Mexican border are good examples of ________ boundaries
A) exclusionary B) inclusionary C) unitary D) monetary E) illusionary
Approximately how many years ago did our species, Homo sapiens, begin to migrate out of Africa and settle in Europe, Asia, and Australia?
A) 100 million years B) 100,000 years C) 1,000 years D) 1 million years E) 10,000 years
Why does natural selection make populations more adapted to their environments?
What will be an ideal response?