What is the basis for life in the hydrothermal vent community?
a. The heated waters surrounding the vents
b. Chemosynthetic organisms
c. Whale falls
d. The biological productivity of the water above
ANS: B
The bottom water in these communities is enriched with hydrogen sulfide, carbon dioxide, and
oxygen. The specialized Archaea and bacteria are chemosynthesizers which provide the base of the
hydrothermal vent food webs. Information can be found in the section Examples of Marine
Communities
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The average number of children born to women in Latin America has been decreasing over the last two decades for all of the following reasons, EXCEPT
A) rural-to-urban migration. B) promotion of family planning programs. C) greater availability of birth control. D) government-imposed financial penalties for large families. E) increased participation of women in the workforce.
Since Mexico's Revolution in 1910, what have been major factors of change in the development of modern Mexico?
Suppose you are traveling in a submersible that is diving from the ocean surface toward the seafloor at a depth of 4000 meters. What would you observe on the submersible's instrument panel as it passed through the thermocline?
A. The temperature of the surrounding ocean water would decrease rapidly. B. The salinity of the surrounding ocean water would decrease rapidly. C. The temperature of the surrounding ocean water would increase rapidly. D. The pH of the surrounding ocean water would increase rapidly.
Sea Surface Temperatures (SST's) are typically warmest
A. north of the Tropics in both hemispheres. B. on the western sides of oceans. C. on the eastern side of oceans. D. along the axis of the Atlantic Ocean and Pacific Oceans.