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MB Ch 14 4/4
Test Description: .
Instructions: Answer all questions to get your test result.
1) Conditions that challenge marine ecosystems in the Arctic include
A
reduced sunlight and very cold water
B
geothermal heating
C
none of the answers are correct
D
krill swarms
2) you find the most productivity in the Arctic
A
along the North Pacific and North Atlantic from April to August
B
surrounding Alaska from April to August
C
along the North Pacific and North Atlantic from September to November
D
north of Canada from September to November
3) The Antarctic seas are some of the most productive marine ecosystems because
A
rich, deep water surfaces to create the largest nutrient rich area on Earth
B
all of the answers are correct
C
the oceans are warmer than you would expect for the latitude
D
there is no hunting permitted there
4) The northern limit of the Antarctic seas is called ___________. It is at approximately __________
A
Antarctic Convergence/50-60 degrees south latitude
B
Southern Convergence/50-60 degrees south latitude
C
Antarctic Divergence/65-70 degrees south latitude
D
Southern Divergence/65-70 degrees south latitude
5) There is not primary productivity in most of the deep ocean because
A
there is no life there
B
its too cold
C
there are no nutrients
D
there is no sunlight
6) Most of the deep ocean gets its nutrient from
A
marine snow
B
hydrothermal vents
C
cold seeps
D
whale falls
7) Organisms found in the abyssal zone are primarily
A
echinoderms and meiofauna
B
kelp
C
all of the answers are correct
D
mammals
8) A whale fall is
A
a place where dead whales rest on the deep ocean floor
B
none of the answers are correct
C
a trap used by whalers
D
pre winter period when whales are very active
9) Whale fall ecosystems go through 3 stages. The second stage is
A
all of the answers are correct
B
small organisms feed on the remaining soft tissue
C
when scavengers arrive
D
chemo synthetic bacteria feed on sulfide from the bones
10) Scientists know little about ecosystems existing in the hadal zone because there is nothing of interest to study there
A
true
B
false
*select an answer for all questions
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