MB Ch 14 4/4 Question Preview (ID: 5378)


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Conditions that challenge marine ecosystems in the Arctic include
a) geothermal heating
b) reduced sunlight and very cold water
c) krill swarms
d) none of the answers are correct

you find the most productivity in the Arctic
a) north of Canada from September to November
b) surrounding Alaska from April to August
c) along the North Pacific and North Atlantic from April to August
d) along the North Pacific and North Atlantic from September to November

The Antarctic seas are some of the most productive marine ecosystems because
a) there is no hunting permitted there
b) the oceans are warmer than you would expect for the latitude
c) rich, deep water surfaces to create the largest nutrient rich area on Earth
d) all of the answers are correct

The northern limit of the Antarctic seas is called ___________. It is at approximately __________
a) Antarctic Convergence/50-60 degrees south latitude
b) Antarctic Divergence/65-70 degrees south latitude
c) Southern Convergence/50-60 degrees south latitude
d) Southern Divergence/65-70 degrees south latitude

There is not primary productivity in most of the deep ocean because
a) there are no nutrients
b) there is no life there
c) there is no sunlight
d) its too cold

Most of the deep ocean gets its nutrient from
a) marine snow
b) whale falls
c) hydrothermal vents
d) cold seeps

Organisms found in the abyssal zone are primarily
a) echinoderms and meiofauna
b) mammals
c) kelp
d) all of the answers are correct

A whale fall is
a) a trap used by whalers
b) pre winter period when whales are very active
c) a place where dead whales rest on the deep ocean floor
d) none of the answers are correct

Whale fall ecosystems go through 3 stages. The second stage is
a) when scavengers arrive
b) small organisms feed on the remaining soft tissue
c) chemo synthetic bacteria feed on sulfide from the bones
d) all of the answers are correct

Scientists know little about ecosystems existing in the hadal zone because there is nothing of interest to study there
a) true
b) false
c)
d)

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