When did Eukaryotes evolved
1.8 bya during Proterozoic Eon
What caused the atmospheric O2 to gradually increase?
Evolution of phtosythtic prokaryotes( cynaobacteria) at 2.6 bya.
Define synaptomorphies and Clade?
Synaptomorphies are traits unique to a clade of organisms. And
A Clade includes an ancestor and all of its descendants.
Traits can be divided into how many part and what are the parts?
2
Ancestral= traits inherited from ancestor and shared with other lineages.
or Derived= traits unique to specific lineage.
They are important for reconstruction of how organisms eveloved and their classification.
How did Euk evolved?
They evolved by an Archean ancestor engulfing bacterial cells
How did Nuclear envelope evolved?
Infolding of plamsma membrane and its continued wiht ER
Who proposed the theory of ENDOSYMBIOSIS?
Lynn Margulis: in 1967 to explain the evolution of Mithochandria
Explain Lynn Margulis Endosymbiosis theory all?
Archean cell which was ANaerobic engulfed a bacterial celll which could make use of O2 to hravest ATP form organic cpds(prod more ATP)
Thus the realtionship was mutuallly beneficial. The Archean becomes a host while the bacteria becomes an endosybiont.
Overtime Endosymbiont evolved into Mitochandria.
List the domain of Eukaryotes?
Euglenozonas, Forams, Diatoms, ciliates, Red Algae, Green ALgae,Plants, Tubulinids, Fungi, Animals
