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Algae and the Origin of Eukaryotic Cells (Concepts # (prokaryotic +…
Algae and the Origin of Eukaryotic Cells
Concepts
#
3 billion years ago
life originated
simple prokaryotic organisms
less then a billion year later
eukaryotic cells came into existence
very simple
prokaryotic + eukaryotic
very simple
membrane bounded nucleus, ER, microtubules..
:red_cross:mitochondria :red_cross:plastids
initially
mitochondria arose first
as early eukaryotic cell engulfed
did not digest bacterium capable of aerobic r
lived together
one inside another
both benefited
endosymbiosis
over year, evolved
eukaryotic cell with real mitochondria
diverged into many species
Green Algae
Brown Algae and Their Relatives
Characteristics of Various Groups of Algae
Origin of Eukaryotic Cells
DNA structure
prokaryotes
DNA - "naked"
not complex with proteins
negative charge - neutralized by Ca+2 ions
eukaryote
more elaborately packaged
complexed w/ nucleosome histone
forms chromosomes
Dinoflagellates
Red Algae
Euglenoids