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