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307615
Evolution
Descripción
science Mapa Mental sobre Evolution, creado por bookworm1511 el 27/10/2013.
Sin etiquetas
science
Mapa Mental por
bookworm1511
, actualizado hace más de 1 año
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Creado por
bookworm1511
hace casi 11 años
37
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Resumen del Recurso
Evolution
Surving in different environments
survival and ability to breed
Charesteristics called adaptions. E.g behaviour, function
Structural
Physical
Colour: camouflarge
Weapon: sting
Apearance: Bigger, mimic
Functional
function of internal organs
depends on immediate environment E.g chamelion
Behaviour
animal acts: nocturnal, still, store food
Plants: narrow leaves
Purpose = survival in environment
no favourable characteristics die out
others survive- offspring inherit- favourable common
allows variation
enivronmental survival
difference in genes, chromosones- inheritance
genetic mutation
diet, avaliaibilty , habitat
Natural selection
process in which enviironmentcs selects favourable charesterisics
reducing unfavourable
Theories of evolution/ beggining of life
1700 belief organisms/ chareteristics fixed
George Buffin: capable of change
Eramus darwin- change to another
Charles Darwin: grandson
different species- common anscestor
Galapogas island- naturaul selction
14 species finches
similar colour- different body
naturaul beak variation
birds suited- survive- offspring
denounced- god
first with scientific proof
alfred russel wallace- same conclusion
inferior killed off
published paper with darwin 1958
Jean BaptisteLarmarck: 1st detailed
simlilarities and difference- only if species are elvoving
adapated through struggle to survive
organs used= stonger 'not used= weaker
changes passed on
no evidence- modern geneitics show aquireed characteristics cannot be inerited
inheritance comes from chromosones
Types
Speciation: process of forming new species
occurs over long time
combination: natural selection and other eg isolation, mutation
1. geographic isolation
earthqauke, group split experiencing diff circumstances
2. Natural selection
over time each group will change
sub species-look diff, still interbreeed
3. Reproductive isolation
isolated long enough- can't interbreed because of change
new species
Divergent
new species-common ancestor
finches
adaptive radiation: organism adapt to new enviro
convergent
elvove and develop similar adaption
similar enviro, lifstyle
parallel
related species - similar features while seperated
look alike and common ancestry but in diff locations
fossil record
palaentology: study of fossils
preserved evi past life
actual remains of organism
mammoth in ice
hard parts of organism
shells,teeth,bones
evi of presence
footprints
impressions
hollowed casts
age of fossil/rocks
radiosotope dating tecniques
scientists developed geological time scale
earth-era-periods-epochs
early life
gaseous methane, ammonia,hydrogen,water vapour split by sunrays
gas molecules and new bonds=organic moleculles
single celled, anareobic = photosethetic bacteria
oxygen- ozane
1500 mill ygo= sexual reproduction
600mill yag recongnisable animals
fossils found- edicara
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