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Test Description: .
Instructions: Answer all questions to get your test result.
1) Most highly productive marine ecosystems are found in cooler regions because
A
those regions have more abundant energy
B
those regions lack high level predators
C
those regions have more abundant nutrients
D
the most productive marine ecosystems are not found in cold, temperate regions
2) The neuston ecosystem covers about ____ of the Earth's surface
A
71%
B
22%
C
51%
D
10%
3) The population of ______ may be about 10.000 times more numerous in the top few millimeters of water than in the water just below
A
all of the answers are correct
B
diatoms
C
cyanophytes
D
dinoflagellates
4) ____may account for low productivity in the neuston ecosystem
A
sargassum
B
photo inhibition and pollution
C
predatory consumption
D
all of the answers are correct
5) The world's largest floating ecosystem is the nertic zone
A
false
B
true
6) The nertic zone is significant as a marine ecosystem because
A
all of the answers are correct
B
it is home to the largest extremophile populations
C
it is the ocean's most productive region
D
it is the largest ecosystem
7) Upwelling are significant to open ocean ecosystems becaue
A
they bring nutrients up from the seafloor
B
all of the answers are correct
C
they carry nutrients away from shore
D
they carry sargassum to warm water
8) Coastal ecosystems are generally highly productive because
A
benthic organisms can live in the upper photic area
B
they benefit from nutrient rich run off from land
C
plants provide shelter
D
all of the answers are correct
9) Human activities have wide ranging potential effects on coastal ecosystem becaue
A
trophic pyramids are unstable in coastal ecosystems
B
all of the answers are correct
C
people dislike coastal ecosystems
D
some activities have immediate consequences but we cannot predict all the consequencess
10) Eutrophication is
A
the trophic pyramid common to European estuaries
B
pollution that results from dumping toxins into the ocean
C
none of the answers are correct
D
pollution that results from excess nutrients in the ocean
*select an answer for all questions
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