Multiple Choice
Which two organelles are hypothesized to have evolved through endosymbiosis according to the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following statements is true regarding the endosymbiotic theory?
A
Endosymbiotic theory states that all organelles in eukaryotic cells originated from symbiotic relationships.
B
Endosymbiotic theory suggests that eukaryotic cells evolved from archaea through a series of mutations.
C
The theory proposes that eukaryotic cells were formed by the fusion of multiple prokaryotic cells.
D
Mitochondria and chloroplasts originated from free-living prokaryotes that were engulfed by ancestral eukaryotic cells.
Verified step by step guidance1
Begin by understanding the endosymbiotic theory, which explains the origin of certain organelles in eukaryotic cells.
The theory suggests that mitochondria and chloroplasts were once free-living prokaryotes, such as bacteria, that were engulfed by ancestral eukaryotic cells.
These engulfed prokaryotes formed a symbiotic relationship with the host cell, providing advantages such as energy production (mitochondria) and photosynthesis (chloroplasts).
Over time, these prokaryotes became integral parts of the eukaryotic cell, evolving into organelles with their own DNA, similar to bacterial DNA.
The presence of double membranes and their own genetic material in mitochondria and chloroplasts supports the idea that they originated from engulfed prokaryotes.
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