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What does the endosymbiotic theory explain?
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5. Cell Components
Endosymbiotic Theory
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According to the endosymbiotic theory, what are the ancestors of chloroplasts in all plant cells?
A
Archaea
B
Fungi
C
Proteobacteria
D
Cyanobacteria
Guida verificata passo dopo passo1
Begin by understanding the endosymbiotic theory, which suggests that certain organelles in eukaryotic cells originated from free-living prokaryotes that were engulfed by ancestral eukaryotic cells.
Identify the organelles involved in the endosymbiotic theory. The primary organelles are mitochondria and chloroplasts.
Focus on chloroplasts, which are the organelles responsible for photosynthesis in plant cells.
Recognize that chloroplasts are believed to have originated from cyanobacteria, which are photosynthetic prokaryotes. This is because cyanobacteria have similar photosynthetic capabilities and structures to chloroplasts.
Conclude that the ancestors of chloroplasts in all plant cells, according to the endosymbiotic theory, are cyanobacteria.
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