Niches and Adaptations IB Biology Year 1 Notes

Evolution
nechangeintreaofaninheritedtraitin apopovertime
donotevolvepopulationsdo
naividuals

ummaryofevolution natural
by selection
sotentialoverproductionofoffspring
variationinthe
genetic pop
a selectivepressure
Differentials urvival treproduction

inthepopovertime
favorablevariationsincrease


natural Selection
itterentialsurvival reproductionofindividualsw favorabletraitsin
necurrentenviornment
survivalofthe fittest
Fittestreferstoabilitytosurviveto agefind
reproductive mate

and reproduce nothow bigorstrongan organism is
Artificialselection
by
roses which b reedplantsor
h umansselectively to traits
animals developparticularphenotypic

an in
result astounding of in
variation shortp eriod
range phenotypic oftimebeselective
assureismorerapidrintense

iche
speciesrole intheeco
su
tem
dudes

renviorn
musical a can solar
mentalc onditions species toleratetemppercipitation radiationterrain

interactions
ithaswiotherspeciescomppredationmutualism
diurnal
cavitypatternnocturnal phenology

e it fromtheenviornment
sources obtains


nicheresourceandhabitat
undamental
the
that speciescouldtheoretically use
bigger
nicheresourceandhabitatthat
realized thespeciesisactuallyabletousesmallerduetocomp
to
manerdue comp

withinsamespeciesintraspecific
betweenspeciescinterspecific

Specialist 11 Generalist
pecialist Generalist

niche
narrow niche
broad

essadaptablebcofspecialized
needs tomanyenviornments
adaptable

likelyto
more extinct
become tobecomeextinct
nesslikely

of
seaspecificset resources useavarietyoresources
f
ilyaffectedbychangingconditions
as nigh oftolerance
r ange

areanadvantagewhenconditionsaremoreconstant haveanadvantagewhenconditionschange