Multiple Choice
According to the endosymbiotic theory, how did mitochondria and chloroplasts arise in eukaryotic cells?
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5. Cell Components
Endosymbiotic Theory
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Which of the following best describes the endosymbiotic theory?
A
It claims that eukaryotic cells are the result of a mutation in prokaryotic cells.
B
It states that eukaryotic cells evolved independently from prokaryotic cells without any symbiotic relationships.
C
It proposes that eukaryotic cells originated from the fusion of multiple prokaryotic cells.
D
It suggests that eukaryotic cells evolved from a symbiotic relationship between different species of prokaryotes.
Verified step by step guidance1
Begin by understanding the concept of the endosymbiotic theory. This theory explains the origin of eukaryotic cells from prokaryotic organisms through symbiosis.
Recognize that the endosymbiotic theory suggests that certain organelles within eukaryotic cells, such as mitochondria and chloroplasts, originated as free-living bacteria that were engulfed by ancestral eukaryotic cells.
Identify the key evidence supporting the endosymbiotic theory, such as the presence of double membranes around mitochondria and chloroplasts, and their own circular DNA similar to bacterial DNA.
Consider the implications of the theory, which include the idea that eukaryotic cells are a result of a long-term symbiotic relationship, rather than a mutation or independent evolution.
Conclude that the correct description of the endosymbiotic theory is that eukaryotic cells evolved from a symbiotic relationship between different species of prokaryotes, as this aligns with the evidence and scientific consensus.
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