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Test Description: .
Instructions: Answer all questions to get your test result.
1) non native species do damage by
A
reducing biodiversity
B
all of the answers are correct
C
out competing and replacing native species
D
disrupting the local ecosystem
2) some ecologist speculate that Earth could become a homogeneous ecosystem because
A
the spread of non native species is so rapid
B
counter measures have been relatively ineffective
C
the spread of non native species is so rapid and the fact that counter measures have been relatively
D
it is the best solution to the problem
3) overfishing affects local ecosystems by creating the imbalance that must result if you eliminate a species from an environment
A
false
B
true
4) The primary cause of coastal wetland destruction is the tendency for
A
the coast to degrade naturally
B
people to relocate coastal species inland
C
people to overfish
D
people to live near the coast
5) estuaries are particularly at risk of destruction because
A
they do not naturally last very long
B
they can be used and real estate or harbors and they are sensitive environments
C
they tend to accumulate toxins from the open sea
6) according to estimates, more than ___% of mangroves has been destroyed
A
10
B
40
C
50
D
25
7) ENSO events seem to correlate with
A
all of the answers are correct
B
dynamite fishing
C
coral bleaching
D
mangrove construction
8) practices destructive to coral associated with capturing fish include
A
dynamite fishing and the use of toxic substances to stun fish
B
electroshock fishing
C
netting
9) scientists estimate that about _% of the worlds coral reefs has been destroyed
A
10
B
50
C
25
D
40
10) with respect to the marine environment, we define pollution as
A
the solution to dilution that affects the physical, chemical or biological environment
B
substances or energy that changes the water quality or affects the physical, chemical or biological
C
primary crude oil or refined oil cause by tanker spills
*select an answer for all questions
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