Endosymbiosis Theory Flashcards
1
Q
State the endosymbiosis theory
A
FIRST early eukaryotic cells engulfed aerobic bacteria
but did not digest them Led to the origin of mitochondria
Then, Early eukaryotic cells engulfed photosynthetic bacteria but did not digest them. Led to origin of chloroplasts
MUTUALLY BENEFICIAL RELATIONSHIP
2
Q
Structural evidence of endosymbiosis
A
- Mitochondria and chloroplasts resemble bacterial structure
- they are found in membranous envelopes (EX: CM)
- are the same approximate size as prokaryotes
- have 70s ribosomes
3
Q
Genetic evidence of endosymbiosis
A
- have circular naked DNA
- DNA shares common sequences with modern prokaryotes
4
Q
Functional evidence of endosymbiosis
A
- move freely within the cell
- Reproduce independently from the cell through binary fission
- Are inhibited by antibiotics
