BIO 320 EXAM 2 STUDY GUIDE
QUESTIONS AND ANSWERS 100%
CORRECT.
What evidence do you have from Darwin's finches that heritability in beak depth was
high? - ANSWERProportion of phenotypic variation due to genetic differences among
individuals (genetic variation) •Ranges from zero to one•Measure through breeding
experiments-Parent-offspring regression.-Selection experiment
Be able to calculate heritability from the selction differential and response to selection in
a truncation selection experiment or in Darwin's finches. - ANSWER...
Why does intraspecific competition tend to broaden resource use in a particular species,
while interspecific competition favors narrower resource use? - ANSWEREffects of
intraspecific competition•When intra-specific competition becomes intense, natural
selection broadens resource use.•Population growth slows or stops •Use of resources
becomes broader as individuals use lower quality resources
What are some strategies that predators use to capture and subdue prey? Describe
anti- predator adaptations found in potential prey species. - ANSWERPrey detection
Capturing and subduing prey
Hunting strategy
Solitary predators
Group hunting
Cooperative hunting
-What is interspecific competition? •Competition occurs when two species share a
limiting resource •Population density of one species is reduced by the presence of the
other. Competitive exclusion principle•
Two species cannot coexist using the same resource. •Population growth of both
species affected by competition, but one will outcompete the other. •Demonstrated in
lab experiments on Paramecium.
How might interspecific competition result in coevolutionary divergence or character
displacement between species? - ANSWERCompetition-driven divergence of two
species.
a.Competing.-Each species supports fewer individuals than could thrive if the other
species were not present.
b.Species coevolve to use different resources; their fitness is greater than those who
use the same resource
QUESTIONS AND ANSWERS 100%
CORRECT.
What evidence do you have from Darwin's finches that heritability in beak depth was
high? - ANSWERProportion of phenotypic variation due to genetic differences among
individuals (genetic variation) •Ranges from zero to one•Measure through breeding
experiments-Parent-offspring regression.-Selection experiment
Be able to calculate heritability from the selction differential and response to selection in
a truncation selection experiment or in Darwin's finches. - ANSWER...
Why does intraspecific competition tend to broaden resource use in a particular species,
while interspecific competition favors narrower resource use? - ANSWEREffects of
intraspecific competition•When intra-specific competition becomes intense, natural
selection broadens resource use.•Population growth slows or stops •Use of resources
becomes broader as individuals use lower quality resources
What are some strategies that predators use to capture and subdue prey? Describe
anti- predator adaptations found in potential prey species. - ANSWERPrey detection
Capturing and subduing prey
Hunting strategy
Solitary predators
Group hunting
Cooperative hunting
-What is interspecific competition? •Competition occurs when two species share a
limiting resource •Population density of one species is reduced by the presence of the
other. Competitive exclusion principle•
Two species cannot coexist using the same resource. •Population growth of both
species affected by competition, but one will outcompete the other. •Demonstrated in
lab experiments on Paramecium.
How might interspecific competition result in coevolutionary divergence or character
displacement between species? - ANSWERCompetition-driven divergence of two
species.
a.Competing.-Each species supports fewer individuals than could thrive if the other
species were not present.
b.Species coevolve to use different resources; their fitness is greater than those who
use the same resource
