Multiple Choice
Which of the following is considered evidence supporting the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Which structural feature supports the hypothesis that chloroplasts originated from cyanobacteria?
A
Presence of double membranes
B
Presence of chlorophyll
C
Circular DNA similar to bacterial DNA
D
Ability to perform photosynthesis
Verified step by step guidance1
Understand the endosymbiotic theory, which suggests that chloroplasts originated from free-living cyanobacteria that were engulfed by a eukaryotic cell.
Identify the structural features of chloroplasts that are similar to cyanobacteria, such as the presence of double membranes.
Recognize that chloroplasts contain circular DNA, which is similar to the DNA found in bacteria, including cyanobacteria.
Note that chloroplasts have the ability to perform photosynthesis, a characteristic they share with cyanobacteria.
Consider the presence of chlorophyll in chloroplasts, which is also found in cyanobacteria, supporting the evolutionary link between the two.
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