Multiple Choice
Which of the following best describes the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Which two organelles are hypothesized to have evolved through endosymbiosis according to the endosymbiotic theory?
A
Golgi apparatus and lysosomes
B
Mitochondria and chloroplasts
C
Endoplasmic reticulum and peroxisomes
D
Nucleus and ribosomes
Verified step by step guidance1
Begin by understanding the endosymbiotic theory, which suggests that certain organelles in eukaryotic cells originated from free-living prokaryotes that were engulfed by ancestral eukaryotic cells.
Identify the key organelles involved in this theory: mitochondria and chloroplasts. These organelles are believed to have evolved from bacteria that were engulfed by early eukaryotic cells.
Consider the evidence supporting this theory, such as the presence of double membranes in mitochondria and chloroplasts, which is consistent with the engulfing process.
Note that mitochondria and chloroplasts have their own DNA, which is similar to bacterial DNA, further supporting the idea that they originated from prokaryotic cells.
Understand that other organelles like the Golgi apparatus, lysosomes, endoplasmic reticulum, peroxisomes, nucleus, and ribosomes are not considered to have evolved through endosymbiosis according to this theory.
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