Multiple Choice
Which statement is evidence used to support the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Which of the following is the strongest evidence supporting the endosymbiotic theory?
A
Similarities in the size of mitochondria and chloroplasts to prokaryotic cells
B
Presence of double membranes in mitochondria and chloroplasts
C
Mitochondria and chloroplasts having their own DNA
D
Ability of mitochondria and chloroplasts to perform photosynthesis
Verified step by step guidance1
Understand the endosymbiotic theory: It suggests that mitochondria and chloroplasts originated as free-living prokaryotes that were engulfed by an ancestral eukaryotic cell.
Identify key evidence supporting the theory: Look for characteristics of mitochondria and chloroplasts that are similar to prokaryotic cells.
Consider the presence of double membranes: This feature suggests that these organelles were once independent prokaryotic cells that were engulfed by a host cell, leading to the formation of a double membrane.
Evaluate the significance of having their own DNA: Mitochondria and chloroplasts contain their own circular DNA, similar to prokaryotic cells, which supports the idea of their prokaryotic origin.
Analyze the ability to perform photosynthesis: While this is a function of chloroplasts, it is not unique evidence of endosymbiosis, as it does not directly relate to their origin as independent prokaryotic cells.
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