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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
geothermal heating
B
reduced sunlight and very cold water
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 September to November
B
along the North Pacific and North Atlantic from April to August
C
north of Canada from September to November
D
surrounding Alaska from April to August
3) The Antarctic seas are some of the most productive marine ecosystems because
A
the oceans are warmer than you would expect for the latitude
B
rich, deep water surfaces to create the largest nutrient rich area on Earth
C
there is no hunting permitted there
D
all of the answers are correct
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
Southern Divergence/65-70 degrees south latitude
D
Antarctic Divergence/65-70 degrees south latitude
5) There is not primary productivity in most of the deep ocean because
A
there is no sunlight
B
there is no life there
C
there are no nutrients
D
its too cold
6) Most of the deep ocean gets its nutrient from
A
hydrothermal vents
B
marine snow
C
whale falls
D
cold seeps
7) Organisms found in the abyssal zone are primarily
A
all of the answers are correct
B
echinoderms and meiofauna
C
mammals
D
kelp
8) A whale fall is
A
a place where dead whales rest on the deep ocean floor
B
a trap used by whalers
C
none of the answers are correct
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
when scavengers arrive
C
chemo synthetic bacteria feed on sulfide from the bones
D
small organisms feed on the remaining soft tissue
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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