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Summary IEB Grade 12 Life Sciences: Evolution CA$8.40   Add to cart
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Summary IEB Grade 12 Life Sciences: Evolution

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 207 views  11 purchases
  • Course
  • Life Sciences
  • Institution
  • 12th Grade

This aesthetic, engaging and in-depth digital summary of the Evolution section: of the Grade 12 IEB syllabus - is sure to help you grasp a clear understanding of the topic as well as aid you to excel in your next test or exam!

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Document information

  • June 15, 2022
  • 13
  • 2021/2022
  • Summary

Subjects

  • ieb biology notes
  • ieb biology matric
  • ieb life sciences matric
  • life sciences matric
  • life sciences ieb
  • life science notes
  • biology notes
  • ieb life science grade 12
  • ieb biology grade 12

Written for

  • 12th Grade
  • Life Sciences
  • 200
All documents for this subject (1054)

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Content preview

effigy
changeordevelopmentof
gradual something
overtime
phenotype
risible
traits
physical
eye
height etc
colour


evolution
Biological genotype geneticcode
changeinthegenepoolofapopulationovertime dominantrecessivemutated
genes
descentw modification caneleigenethatcodestoraspecific
c haracteristic



microevolution evolutionw aspecies wasLamarcktheorycorrect
macroevolution descentof
dirtspeciesfromacommon
over
ancestor manygenerations abletoproduce
Hisbeliefoftheenvirobeing

species groupofsimilarindividuals
thatare phenotypicchangeswas
correcthowever hewas
capableof
exchanging
genes successful
through incorrectforthinkingthiscausedevolutionary
change
line
downthe
inbreeding successbreed
1700
Before c haracteristicinfluences
Bodybuildingacquired

scientist
accepted thephenotypebutdoesnotalterthegenotypeof
speciesunrelated remainedunchanged spermandeggcells
earthyoung
1700 11800
ErasmusDarwin JeanBaptisteLamarckchallenge
prior
concepts
specieschanged overtime
gradually nearly18001900
earthwas old
millionsofyears CharlesDarwin AlfredWallace
putforwardanacceptablemechanismforevolution
Erasmus Darwin
zoonomia book
life fromacommonancestor
descended Charles Darwin
suggested must'vechanged
additionallyspecies time
over travelbecame
throughout aware of
diversity orgs
among
JEAN BAPTISTE Lamarck variation ofindividuals
Philosophiezoologique of
distribution species

notfixed
proposedspecies Hethenrealised
tosurviveinnew
changed environment earth'svold
passedon tooffspring
changes great changes
geological

usedisuseofbodyparts isolationleadtospecieschanging
Clinked
betweenenviromenttchangeinspecies He
spokeof 2 vitallyimportanthypotheses
of
inheritance acquiredcharacteristics

softinheritance Lamarckism
1 modification n
diversityotspeciesasaresuitofevolutio

related
orgs common
ancestor
local
adaptednew conditions

by
was branching
diversification

somespeciesdie
out

2 naturalselection
best
individuals to
will
adapted enviro
themost
leave offspring
ofthe
survival fittest

, Dbetween forms
intermediate
groups
o ancestors
glom wereisolated newspecies traditional
fossils
traits
mixturesnowline n
paleontology
o lesspopular onegrouprisentromanother
mammaimarepties
studyotprenistoricate

vertebrate
archeopteryx
wireptitiontbirateatures

EvidenceEvolution
cmore
extinctasmores fossil
1 FossilEvidence
backintime
cannotadaptdiereplaced
extinctintiominionyrs
records
i
difflayersofrocksoldest


2 Biogeography living
fossilssurvived
virtually
3 DNAgenetics molecularbiology unchanged forlong a icomplexityovertimechanges
coelacanth accumulatedovertime
4 Homologies comparativeanatomy aatofspeciesever descendedfromcommon cambarianperiod
5 areextinct a daptedto
which
ancestor
rapiddiversification
Embryology mass destruction
new enviro
6 events
extinction of of
appearance diversity c omplex
vestgialorgans icladogenesis multicelledorgs
beforesimpleindividualcells
7 Biodiversity om
variety f odified
descendants
g myo
evolutionarydivergence




islands
Galapagos

wallace's ammockingbird stuayofwneretwny
occur
linebisects
molayarchipelagointocuparts
indigisianas species

eachdisterentorg similar
diffregionw
prevent
migration c onditions
climate
zairgroupsoforgsarisen
plants
ant
containedv animal

Biogeography
4 biogeogfossiis tossfrom a
extinct of.it tyearihegrsfteYens
closelyresembled
species
livingspeciesinsameregion
it from
descended species
modernspeciesrepiaceat
e
they
ancestor belocated
would
nearby
v
3Distributionof
speciesonoceanicislands 2 veryaitlocations
while
species similar satsamerica diffmonkeys
stilldifferent diffflightlessbirds
similartothose
more mammalsinAfricamarsupials
closesttomainland
n


studyothereditary
stuayorgenestinneritance
otvariationttraitsoflivingorgs



canstvayanas Genetics
compare

mtdna
Dna
chromosomal
1 All
orgs from
descended
a ancestor
common
allhaveonatrna
manygenesthatare

2organisms'arerelated to
encoded make i dentical
toeobyvaryingdegrees proteins


ofsequencesof
similarities
chromosomal
Dnamtdna
nucleotide
moresequencesshared
recent
common
a ncestor
icloser
relationship
fewersequencesshared
distant
relationship
ancestor
ifurtherinpastc ommon

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