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Biology-Endosymbiotic Theory (Dr. Margulis)

Biology7 CardsCreated 4 months ago

This deck covers key concepts of the endosymbiotic theory, including its definition, evidence, and processes involved in the evolution of eukaryotic cells.

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Endosymbiotic Theory

Symbiogenesis, or endosymbiotic theory, is an evolutionary theory that explains the origin of eukaryotic cells from prokaryotes;, Mitochondria from chloroplasts;, It states that several key organelles of eukaryotes originated as a symbiosis between separate single-celled organisms.
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Key Terms

Term
Definition
Endosymbiotic Theory
Symbiogenesis, or endosymbiotic theory, is an evolutionary theory that explains the origin of eukaryotic cells from prokaryotes;, Mitochondria from ch...

Picture

http://www.google.com/url?sa=i&source=imgres&cd=&ved=0CAkQjRwwAGoVChMIidP5if2iyAIVjzqICh2rCwRS&url=https...

Evidence:
Mitochondria have 2 membranes;, have own DNA;, have own ribosomes;, have own tRNA molecules;, have own RNA polymerace;, have own DNA polymer ace;, at ...
symbioses
two organisms together
endosymbiotic
inside one another
Mitochondria
bigger cell captures smaller cell, which now has two membranes; smaller cell gets ATP from big cell
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Biology-Endosymbiotic Theory (Dr. Margulis)
TermDefinition
Endosymbiotic Theory
Symbiogenesis, or endosymbiotic theory, is an evolutionary theory that explains the origin of eukaryotic cells from prokaryotes;, Mitochondria from chloroplasts;, It states that several key organelles of eukaryotes originated as a symbiosis between separate single-celled organisms.

Picture

http://www.google.com/url?sa=i&source=imgres&cd=&ved=0CAkQjRwwAGoVChMIidP5if2iyAIVjzqICh2rCwRS&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FSymbiogenesis&psig=AFQjCNHOGnOvYoB1iKkVZpoFnkmFPjzX8g&ust=1443847462128294

Evidence:
Mitochondria have 2 membranes;, have own DNA;, have own ribosomes;, have own tRNA molecules;, have own RNA polymerace;, have own DNA polymer ace;, at one time were free, living cells
symbioses
two organisms together
endosymbiotic
inside one another
Mitochondria
bigger cell captures smaller cell, which now has two membranes; smaller cell gets ATP from big cell
actions
- the primitive heterotrophic eukaryote is entered by proteobacterium and avoids digestion., - becomes endosymbiant; cell within another, - smaller cell gets ATP from bigger cell, - proteobacterium is eventually assimilated and becomes a mitochondria, - some eukaryotes go to acquire additional endosymbiants and and the cyanobacteria become chloroplasts