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