1
BIO 182 ASU FINAL EXAM ACTUAL EXAM COMPLETE
ACCURATE EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A
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 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)
, 2
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
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
, 3
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
What are phenology shifts? - (ANSWER)*Related to global climate change*
-Timing of seasonal events
-Concern mismatch between organisms
What are geographic range shifts? - (ANSWER)*Related to global climate change*
-Organisms move into climates to which they're adapted
-Concern for organisms in arctic and alpine regions (running out of habitat)
What are consequences of extinction? - (ANSWER)-Impacts productivity and
stability, and biological communities
-Ecosystem services
-Could disrupt mutualisms
What is resource use efficiency? - (ANSWER)-When species diversity is high, more
overall water is used and more photosynthesis can occur
What is facilitation? - (ANSWER)-Certain species facilitate the growth of another
species by providing them with nutrients, partial shade, etc.
BIO 182 ASU FINAL EXAM ACTUAL EXAM COMPLETE
ACCURATE EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A
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 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)
, 2
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
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
, 3
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
What are phenology shifts? - (ANSWER)*Related to global climate change*
-Timing of seasonal events
-Concern mismatch between organisms
What are geographic range shifts? - (ANSWER)*Related to global climate change*
-Organisms move into climates to which they're adapted
-Concern for organisms in arctic and alpine regions (running out of habitat)
What are consequences of extinction? - (ANSWER)-Impacts productivity and
stability, and biological communities
-Ecosystem services
-Could disrupt mutualisms
What is resource use efficiency? - (ANSWER)-When species diversity is high, more
overall water is used and more photosynthesis can occur
What is facilitation? - (ANSWER)-Certain species facilitate the growth of another
species by providing them with nutrients, partial shade, etc.
