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non native species do damage by
a) disrupting the local ecosystem
b) out competing and replacing native species
c) reducing biodiversity
d) all of the answers are correct

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) it is the best solution to the problem
d) the spread of non native species is so rapid and the fact that counter measures have been relatively

overfishing affects local ecosystems by creating the imbalance that must result if you eliminate a species from an environment
a) true
b) false
c)
d)

The primary cause of coastal wetland destruction is the tendency for
a) people to overfish
b) people to relocate coastal species inland
c) people to live near the coast
d) the coast to degrade naturally

estuaries are particularly at risk of destruction because
a) they can be used and real estate or harbors and they are sensitive environments
b) they do not naturally last very long
c) they tend to accumulate toxins from the open sea
d)

according to estimates, more than ___% of mangroves has been destroyed
a) 10
b) 25
c) 40
d) 50

ENSO events seem to correlate with
a) dynamite fishing
b) coral bleaching
c) mangrove construction
d) all of the answers are correct

practices destructive to coral associated with capturing fish include
a) dynamite fishing and the use of toxic substances to stun fish
b) netting
c) electroshock fishing
d)

scientists estimate that about _% of the worlds coral reefs has been destroyed
a) 10
b) 25
c) 40
d) 50

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
d)

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