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BIO 182 ASU FINAL EXAM ACTUAL EXAM COMPLETE
ACCURATE EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+/ LATEST EXAM!!!
What is extinction? - Answer-The loss or death of a
species
What is mass extinction? - Answer-A decline in biodiversity
greater than the background extinction rate
What is background extinction? - Answer-Background
extinction occurs when certain populations are reduced to
zero because of normal environment change, emerging
disease, predation pressure, or competition with another
species
How are mass extinctions detected and how many have
been detected? - Answer-They're detected geologically,
and there have been 5 detected
What organisms became extinct during the Pleistocene
and Cretaceous and what are possible causes for these
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extinctions? - Answer-Pleistocene: Wooly Mammoth, Giant
Short-Faced Bear, Dire Wolf, Giant Beaver, Shasta
Ground Sloth, American Lion
-Could be extinct because of climate change (warmer
temps), human overkill (predation), pathogens
Cretaceous: Dinosaurs
-Could be extinct because of asteroid (impact hypothesis)
What is the evidence to support that there will be a 6th
mass extinction? - Answer-Modern rates of extinction are
100 to 1000 time greater than the background rate
What is overexploitation? - Answer--Any unsustainable
removal of wildlife from the natural environment by use of
humans
-Harvesting of organisms at rates exceeding the species
ability to replace itself
-The dominant threat to marine species
-Overhunting
What is habitat destruction? - Answer-Terrestrial
Ecosystems: Conversion agriculture, logging,
development and urbanization
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Aquatic Ecosystems: Draining and developing wetlands,
damming rivers
Species area curve - As the land area decreases, the
number of species decreases
What is habitat fragmentation? - Answer--The breakup of
large pieces of natural habitat into small, isolated pieces
-Can reduce a habitat to where it's too small to support a
species
-Reduces the ability of individuals to disperse from one
habitat to another (could be more vulnerable to
catastrophes)
-Creates a large amount of "edge" habitat (Edge effects
light levels, pollution, poachers, and competition)
-The species most impacted by this are those that require
large territories to find food
How can an exotic species contribute to extinction? -
Answer--An introduction of a new species, that could
possibly become an invasive species
-An exotic species could carry pathogens
BIO 182 ASU FINAL EXAM ACTUAL EXAM COMPLETE
ACCURATE EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+/ LATEST EXAM!!!
What is extinction? - Answer-The loss or death of a
species
What is mass extinction? - Answer-A decline in biodiversity
greater than the background extinction rate
What is background extinction? - Answer-Background
extinction occurs when certain populations are reduced to
zero because of normal environment change, emerging
disease, predation pressure, or competition with another
species
How are mass extinctions detected and how many have
been detected? - Answer-They're detected geologically,
and there have been 5 detected
What organisms became extinct during the Pleistocene
and Cretaceous and what are possible causes for these
,2|Page
extinctions? - Answer-Pleistocene: Wooly Mammoth, Giant
Short-Faced Bear, Dire Wolf, Giant Beaver, Shasta
Ground Sloth, American Lion
-Could be extinct because of climate change (warmer
temps), human overkill (predation), pathogens
Cretaceous: Dinosaurs
-Could be extinct because of asteroid (impact hypothesis)
What is the evidence to support that there will be a 6th
mass extinction? - Answer-Modern rates of extinction are
100 to 1000 time greater than the background rate
What is overexploitation? - Answer--Any unsustainable
removal of wildlife from the natural environment by use of
humans
-Harvesting of organisms at rates exceeding the species
ability to replace itself
-The dominant threat to marine species
-Overhunting
What is habitat destruction? - Answer-Terrestrial
Ecosystems: Conversion agriculture, logging,
development and urbanization
, 3|Page
Aquatic Ecosystems: Draining and developing wetlands,
damming rivers
Species area curve - As the land area decreases, the
number of species decreases
What is habitat fragmentation? - Answer--The breakup of
large pieces of natural habitat into small, isolated pieces
-Can reduce a habitat to where it's too small to support a
species
-Reduces the ability of individuals to disperse from one
habitat to another (could be more vulnerable to
catastrophes)
-Creates a large amount of "edge" habitat (Edge effects
light levels, pollution, poachers, and competition)
-The species most impacted by this are those that require
large territories to find food
How can an exotic species contribute to extinction? -
Answer--An introduction of a new species, that could
possibly become an invasive species
-An exotic species could carry pathogens
