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Aquatic Ecosystems Rev. #2
Test Description: Chapter 7: Freshwater and Marine Biomes
Instructions: Answer all questions to get your test result.
1) From where do most of the nutrients in the Arctic come?
A
the ocean
B
decomposing marine organisms trapped in the ice
C
melting ice
D
arctic lakes
2) What is effective at forming a nutrient trap?
A
melting ice from polar ecosystems
B
the benthic zone of the deep ocean
C
wave action on a rocky shore
D
fresh water from rivers mixing with salt water from oceans in estuaries
3) Which of the following marine ecosystem is the least productive?
A
coral reefs
B
shallow, coastal waters
C
deep open ocean waters
D
littoral zone
4) What is the base of marine food webs?
A
plankton
B
nekton
C
large marine carnivores
D
coral polyps
5) What is the source of most ocean pollution?
A
global warming
B
waste from fishing ships
C
activities on land
D
spills from oil tankers
6) Which of the following is NOT a marine ecosystem?
A
mangrove swamps
B
Great Barrier coral reef
C
salt marsh
D
the Florida Everglades
7) Which of the following is NOT a threat to coral reefs?
A
coral being exposed to salt water
B
silt runoff which leads to muddy waters
C
diving and fishing
D
excessive nutrients which leads to excessive algal growth
8) One way in which wetlands control flooding is by ---.
A
providing habitats for migratory wildlife
B
reducing the amount of carbon dioxide released into the air
C
absorbing water from rivers
D
filtering out water pollutants
9) What adaptation prevents phytoplankton from sinking into deep waters?
A
whiskers
B
stinging tentacles
C
flagella
D
streamlined body shape
10) What distinguishes nekton from benthos?
A
one is a predator and the other is a primary producer
B
one lives only in rivers and the other lives only in lakes
C
one swims freely and the other is often attached to hard surfaces
D
one lives in freshwater and the other lives in salt water
*select an answer for all questions
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