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20 Cards in this Set
- Front
- Back
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Seasonal temp changes in the ocean are the greatest in
a. polar surface waters b. equatorial surface waters c. temperate surface waters d. the deep sea |
c. temperate surface waters
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The two factors that most affect seawater density are
a. temperature and salinity b. temperature and oxygen c. oxygen and salinity d. nitrogen and temperature |
a. temperature and salinity
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Which of the following colors of light reaches the greatest depth in the ocean before being completely absorbed?
a. blue b. red c. green d. violet e. yellow |
a. blue
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In the temperate zone, toward the end of the spring
a. the thermocline increases b. the thermocline decreases c. mixing from below brings bottom nutrients toward the surface d. the phytoplankton begin a secondary early summer increase |
a. the thermocline increases
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Marine snow
a. forms only in Antarctic waters b. is formed only in tropical clear ocean waters c. is extremely pure particulate organic matter d. is found throughout the ocean water column |
d. is found throughout the ocean water column
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One experiment discussed in class examined the significance of different reef habitat compositions on the species richness of fish populations. Which aspect of reef structure was found to be most significant in determining high species richness?
a. the presence of a flat surface b. the rugosity of the habitat c. the number of holes in the habitat d. the size of the habitat |
b. the rugosity of the habitat
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Because of the Coriolis effect, a water current moving in the northern hemisphere will tend to ___ as it moves along its course
a. curve to the right b. curve to the left c. continue on a straight path |
a. curve to the right
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Vents and cold seeps depend on primary production generated by ___
a. chemosynthetic bacteria b. heterotrophic bacteria c. photosynthetic bacteria d. photosynthetic algae e. chloroplast symbionts |
a. chemosynthetic bacteria
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For phytoplankton,
a. only infrared light is captured by chlorophyll b. the entire visible spectrum of wavelengths is captured by chlorophyll alone c. chlorophyll and other light-harvesting pigments collectively capture a wide spectrum of visible light d. light penetrates to several thousand meters, allowing phytoplankton cells to live there |
c. chlorophyll and other light-harvesting pigments collectively capture a wide spectrum of visible light
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Zooplankton grazing
a. is not required for a spring diatom bloom to end b. may produce alternate areas of abundance and less abundant phytoplankton c. can fail to increase beyond an upper limit determined by phytoplankton cell concentration d. all of the above |
d. all of the above
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Primary production in the sea
a. is lowest in polar regions in the summer b. is seasonal only in mid-latitudes c. is lowest in tropical surface waters d. is lowest over the continental shelf |
c. is lowest in tropical surface waters
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The oxygen minimum zone generally falls to its lowest value at which one of the following depths?
a. 0-100 m b. 200-1,000 m c. 1,000-2,000 m d. >2 km |
b. 200-1,000 m
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Phytoplankton comprise the ___ trophic level of virtually all marine food webs.
a. first b. second c. third d. fourth e. keystone |
a. first
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In waters that are thermally stratified, the upper water layer is ___ than the lower layers.
a. more dense b. less dense c. cooler d. none of the above |
b. less dense
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The compensation depth is that depth in the water column where ___.
a. rate of photosynthesis of an organism=rate of respiration of that organism b. rate of photosynthesis of an organism>rate of that organism c. rate of photosynthesis of an organism<rate of respiration of that organism d. none of the above |
a. rate of photosynthesis of an organism=rate of respiration of that organism
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Benthic species with planktotrophic larvae
a. have narrower biogeographic ranges than species with nonplanktrophic larvae b. are found only in the Pacific Ocean c. are common in deep-sea soft bottoms d. have broader biogeographic ranges than species with nonplanktonic larvae |
d. have broader biogeographic ranges than species with nonplanktonic larvae
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The process by which deep water is brought to the surface is called ___.
a. upwelling b. spring tide c. fetch d. benthic flush e. downwelling |
a. upwelling
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Planktonic organisms are usually
a. distributed at random in the water column b. found only at the air-water interface c. found near the surface during the day and at depth at night d. patchily distributed in the water column |
c. found near the surface during the day and at depth at night
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In the rocky intertidal zone, which one of the following resources is most often in limited supply?
a. space b. food c. mates d. vitamins e. oxygen |
a. space
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Suspension feeders do badly in mud because ofL
a. a very low food supply b. anoxic pore water in the sediment c. predation d. high turbidity near the sediment-water interface |
d. high turbidity near the sediment-water interface
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