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Ursprung Metazoa Zusammenfassung

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Stammbaum und Eigenschaften der Metazoa

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Uploaded on
April 27, 2025
Number of pages
4
Written in
2023/2024
Type
Summary

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[101
Symplesiomorph

synapomorphy

Autapomouphy
neues Merkmal
phylogenetische Systematik
-




↳ schwierig Aspekte :
der Zeit und wie diese in
phylogenetischen
Studien
integriert werden können


>
-
Missverständnis bei Zuordnung
>
- Para- & polyphylet Gruppen
. sind falsch angenommene Monophylet .
Gruppen


A BC A BC A BC

Konvergenz



monophylet. Gruppe paraphylet. Gruppe polyphylet. Gruppe
>
-
alle Nachkommen -
ähnliche Merkmale
von einem Vorfahren

Analogie



Homologie





Autapomorphien
·
vielzelligkeit
·
Zell-Zell-Kontakte (tight junctions
· ECM


·
Verankerung der Zellen auf ECM (Hemidesmosomen)

· destinkte apikal-basal Achse der Zelle


·
geschlechtl Fortpflanzung
.
mit Anisogameten (Eier Spermien)
,




·
Meiose

·

Zygote Embryogenese Furchung
, ,




·
Sensorik Calcium :

Signaling ,
Chemo- Photo-
, , Mechanorezeptoren
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