JMU BIO 150 Exam 2 QUESTIONS WITH
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ASWERS
Define macroevolution - CORRECT ANSWERS
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✔✔evolutionary change above the species level, including |\ |\ |\ |\ |\ |\
the origin of a new group of organisms or a shift in the
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broad pattern of evolutionary changes over time
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How do we identify a species? - CORRECT ANSWERS
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✔✔groups of actually or potentially interbreeding
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populations that are reproductivley isolated from other
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such groups|\
Define reproductive isolation - CORRECT ANSWERS
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✔✔cannot produce viable offspring |\ |\ |\
Define viable - CORRECT ANSWERS ✔✔offspring can
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reproduce
Define speciation - CORRECT ANSWERS ✔✔splitting event
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that creates two or more distinct species from a single
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ancestral group |\
,What are the three stages of specification? - CORRECT
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ANSWERS ✔✔1. population separation
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2. divergence
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3. productive isolation preventing gene flow
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Define population separation - CORRECT ANSWERS
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✔✔isolation of gene pool |\ |\ |\
Define divergence - CORRECT ANSWERS ✔✔changes in
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gene pool (1 or both)
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What are the two types of separation of populations? -
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CORRECT ANSWERS ✔✔-allopatric model
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-sympatric model |\
Define allopatric model - CORRECT ANSWERS
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✔✔separation due to geographic isolation |\ |\ |\ |\
Define sympatric model - CORRECT ANSWERS
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✔✔separation due to competition or polylodisism in
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population
What are the mechanisms of allopatric separation? -
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CORRECT ANSWERS ✔✔-dispersal and colonization
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, -vicariance
Define dispersal and colonization - CORRECT ANSWERS
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✔✔-start with one continuous population
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-goes to an isolated area (island)
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-finishes with one population isolated from the other
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Define vicariance - CORRECT ANSWERS ✔✔-start with one
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continuous population
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-landscape is changed |\ |\ |\
-two populations are isolated from one another
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When does peripatric speciation occur? - CORRECT
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ANSWERS ✔✔when one of the isolated populations have
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very few individuals
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What causes divergence of populations in sympatric
|\ |\ |\ |\ |\ |\ |\
speciation? - CORRECT ANSWERS ✔✔-disruptive selection
|\ |\ |\ |\ |\ |\
-polyplodism
Define adaptive radiation - CORRECT ANSWERS ✔✔the
|\ |\ |\ |\ |\ |\ |\
rapid diversification of a group of organisms into forms
|\ |\ |\ |\ |\ |\ |\ |\ |\
filling different ecological niches via sympatry
|\ |\ |\ |\ |\
|\ |\ |\ |\ |\ |\ |\
ASWERS
Define macroevolution - CORRECT ANSWERS
|\ |\ |\ |\ |\
✔✔evolutionary change above the species level, including |\ |\ |\ |\ |\ |\
the origin of a new group of organisms or a shift in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
broad pattern of evolutionary changes over time
|\ |\ |\ |\ |\ |\
How do we identify a species? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔groups of actually or potentially interbreeding
|\ |\ |\ |\ |\ |\
populations that are reproductivley isolated from other
|\ |\ |\ |\ |\ |\ |\
such groups|\
Define reproductive isolation - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔cannot produce viable offspring |\ |\ |\
Define viable - CORRECT ANSWERS ✔✔offspring can
|\ |\ |\ |\ |\ |\ |\
reproduce
Define speciation - CORRECT ANSWERS ✔✔splitting event
|\ |\ |\ |\ |\ |\
that creates two or more distinct species from a single
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ancestral group |\
,What are the three stages of specification? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔1. population separation
|\ |\ |\ |\
2. divergence
|\
3. productive isolation preventing gene flow
|\ |\ |\ |\ |\
Define population separation - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔isolation of gene pool |\ |\ |\
Define divergence - CORRECT ANSWERS ✔✔changes in
|\ |\ |\ |\ |\ |\ |\
gene pool (1 or both)
|\ |\ |\ |\
What are the two types of separation of populations? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔-allopatric model
|\ |\ |\
-sympatric model |\
Define allopatric model - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔separation due to geographic isolation |\ |\ |\ |\
Define sympatric model - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔separation due to competition or polylodisism in
|\ |\ |\ |\ |\ |\ |\
population
What are the mechanisms of allopatric separation? -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔-dispersal and colonization
|\ |\ |\ |\ |\
, -vicariance
Define dispersal and colonization - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔-start with one continuous population
|\ |\ |\ |\ |\
-goes to an isolated area (island)
|\ |\ |\ |\ |\
-finishes with one population isolated from the other
|\ |\ |\ |\ |\ |\ |\
Define vicariance - CORRECT ANSWERS ✔✔-start with one
|\ |\ |\ |\ |\ |\ |\
continuous population
|\ |\ |\
-landscape is changed |\ |\ |\
-two populations are isolated from one another
|\ |\ |\ |\ |\ |\
When does peripatric speciation occur? - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔when one of the isolated populations have
|\ |\ |\ |\ |\ |\ |\ |\
very few individuals
|\ |\
What causes divergence of populations in sympatric
|\ |\ |\ |\ |\ |\ |\
speciation? - CORRECT ANSWERS ✔✔-disruptive selection
|\ |\ |\ |\ |\ |\
-polyplodism
Define adaptive radiation - CORRECT ANSWERS ✔✔the
|\ |\ |\ |\ |\ |\ |\
rapid diversification of a group of organisms into forms
|\ |\ |\ |\ |\ |\ |\ |\ |\
filling different ecological niches via sympatry
|\ |\ |\ |\ |\
