Multiple Choice
What event is thought to have contributed to the evolution of eukaryotes according to the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Which of the following pieces of evidence supports the endosymbiotic theory that mitochondria are of prokaryotic origin?
A
Mitochondria have their own circular DNA similar to bacterial DNA.
B
Mitochondria are surrounded by a single membrane like most eukaryotic organelles.
C
Mitochondria are capable of independent reproduction outside the cell.
D
Mitochondria can perform photosynthesis like chloroplasts.
Verified step by step guidance1
Understand the endosymbiotic theory: This theory suggests that mitochondria originated from free-living prokaryotic organisms that were engulfed by an ancestral eukaryotic cell.
Identify key characteristics of prokaryotic cells: Prokaryotes, such as bacteria, typically have circular DNA and lack a nucleus.
Evaluate the evidence: Mitochondria have their own circular DNA, which is similar to the DNA found in prokaryotes, supporting the idea that they originated from a prokaryotic ancestor.
Consider the structure of mitochondria: Mitochondria are surrounded by a double membrane, not a single membrane, which is consistent with the engulfing mechanism proposed by the endosymbiotic theory.
Clarify misconceptions: Mitochondria cannot reproduce independently outside the cell, nor can they perform photosynthesis. These statements do not support the endosymbiotic theory.
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