MB 14 2/4: Question Preview (ID: 5376)

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