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BIOL 215 Final Exam Questions and Answers All Correct

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biol 215
biol 215 final exam
what is sulfur dioxide
biol 215 final exam questions and answers
what are the impacts of acid rain

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BIOL 215 Final Exam Questions
and Answers All Correct
What is sulfur dioxide? - Answer-a gas that counteracts atmospheric warming but
produces smog that makes acid rain (highest in South America)

What are the impacts of acid rain? - Answer-forest damage, crop loss, reduced
agricultural production, death of aquatic ecosystems (in northern hemisphere lakes) by
lowering pH to 3.2-5 from 5.8

What is a safe air quality? - Answer-25 micrograms/m3 (bad at 300, hazardous at 500)

What causes radioactivity? - Answer-nuclear power plants (uranium or plutonium for
fuel)

How many nuclear power plants are there in the world? - Answer-440

How does global warming affect aquatics? - Answer-ocean warming (especially in
arctic), ocean acidification, and oil spills

How does ocean acidification take place? - Answer-increased ice melting leads to more
exposed seawater that then takes in CO2, lowering alkalinity

What is biomagnification? - Answer-the concentration of toxins in an organism as a
result of its ingesting other plants or animals in which the toxins are more widely
disbursed.

What's an example of biomagnification? - Answer-DDT pesticide (banned in 1972 and in
world in 2002 - Stockholm convention)

What pollutant was affecting Alaska's salmon? - Answer-PCBs from their oceanic
feeding grounds

Why were coho salmon dying in the US Pacific Northwest after rainstorms? - Answer-
6PPD-quinone tire ozone protector would runoff from the road

What was killing st Lawrence belugas? - Answer-PAHs from fossil fuels, causing
intestinal cancers and sterility

, what was special about the washed-up orca from gulf islands? - Answer-She had the
highest levels of contaminants ever reported in a marine mammal (from eating affected
prey)

What were researchers finding in BC grizzly bear hair? - Answer-nitrogen and carbon
stable isotopes indicating the indirect consumption of OCs and PBDEs from terrestrial
vegetation and POPs from salmon

What pollutant was present in the ivory gull? - Answer-mercury

what insecticide was widely used and claimed to be unharmful? - Answer-thiamethoxam
that uses organophosphates (parathion and malathion)

what species were harmed by organophosphate pesticides? - Answer-birds

what pesticide was discovered to be non-destructive? - Answer-neonicotinoids
(naturally produced by plants)

what species suffered as a result of neonicotinoids? - Answer-bees (colony collapse
disorder) and their predators (bats and birds)

Why do marine birds mistake plastic for food? - Answer-DMS is emitted from seawater-
exposed plastic, which is also released from phytoplankton (which is their diet)

how long does a species persist before disappearing? - Answer-1 million years in fossil
records

what is the major characteristic of natural extinction? - Answer-the species that goes
extinct is replaced by a different species of similar niche so that there is no overall
trophic change in the community

what animals were introduced around the globe for human consumption? - Answer-pigs
and goats

what are some ecological impacts of European colonization? - Answer-major habitat
alteration and decline of native species

What was causing a large decline of native birds in BC, Hawaii, and New Zealand? -
Answer-rats

What animal was introduced in New Zealand to combat rat predation? - Answer-
mongooses

What animal accompanied humans to control rats in Australia? - Answer-cats

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