pteridófitas
TRANSCRIPT
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PTERIDÓFITASPTERIDÓFITAS
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Relações filogenéticas
Algas verdes(grupo externo) Briófitas Pteridófitas Gimnospermas Angiospermas
Gametângios revestidos por células estéreisEmbrião retido no gametângio feminino
Vasos condutores de seiva
Sementes
Flores e frutos
Espermatófitas (plantas que produzem sementes)
Traqueófitas (plantas vasculares)
Embriófitas
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Ciclo de vida: BriófitasCápsula (2n)
Meiose no interior da cápsula,formando esporos (n)
Esporos (n)eliminadosda cápsula
Gametófito masculino (n)
Gametófitofeminino (n)
Gam
etófito feminino (n)
Esporófito (2n)
Pé
Haste
Cápsula
Anterídio (n)(gametângiomasculino)
Anterozóides (n)(gametas masculinos)
Arquegônio (n)(gametângio feminino)
Oosfera (n)(gameta feminino)
Fecundaçãoe divisão mitóticaArquegônio (n)
com embrião (2n)
Germinação
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LIBERAÇÃO DOS ESPOROSLIBERAÇÃO DOS ESPOROS
ESPORÂNGIOSESPORÂNGIOS
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FORMAÇÃO DO ESPORÂNGIOFORMAÇÃO DO ESPORÂNGIO 2N2N
ESPORÂNGIO ESPORÂNGIO MADUROMADURO
2N2N
NN
MEIOSEMEIOSE
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GERMINAÇÃO GERMINAÇÃO DO ESPORODO ESPORO
PROTALOPROTALO
FORMANDO OFORMANDO O
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Filo Pterophyta
Protalo (n)
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FECUNDAÇÃOFECUNDAÇÃO
OOSFERA OOSFERA (N)(N)
ANTEROZÓIDE ANTEROZÓIDE (N)(N)
ZIGOTO ZIGOTO (2N)(2N)
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Anterídio com anterozóides
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Arquegônios (uma oosfera em cada)
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Filo Pterophyta
Protalo (n)
![Page 18: Pteridófitas](https://reader030.vdocuments.mx/reader030/viewer/2022020218/559842b81a28ab0f328b468f/html5/thumbnails/18.jpg)
Esporófito jovem
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Báculo
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Soros
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Soro
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Esporângios com esporos
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ANEL
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Esporos
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PROTALO PROTALO (N)(N)
ESPORÓFITO ESPORÓFITO (2N)(2N)
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Ciclo de vida: Pteridófitas
Esporângio(2n)
Meiose
Esporo (n)
Germinação
Prótalogametófito
(n)
Arquegônio(n)
Fecundação
Zigoto (2n)Esporófito (2n)
Oosfera(n)
Anterídio(n)
Anterozóides(n)
Gametófito(n)
Esporófito(2n)
![Page 28: Pteridófitas](https://reader030.vdocuments.mx/reader030/viewer/2022020218/559842b81a28ab0f328b468f/html5/thumbnails/28.jpg)
PSILOTUMPSILOTUM
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LICOPODIUMLICOPODIUM
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EQUISETUMEQUISETUM