Multiple Choice
Which of the following is not classified as a Prokaryote?
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1. Overview of Cell Biology
Evolution of the Cell
Multiple Choice
From which taxon are mitochondria thought to have evolved according to the endosymbiotic theory?
A
Cyanobacteria
B
Gram-positive Firmicutes
C
Archaea (methanogens)
D
Alphaproteobacteria
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Understand the endosymbiotic theory, which proposes that mitochondria originated from a symbiotic relationship where a eukaryotic cell engulfed a prokaryotic cell.
Recall that mitochondria are believed to have evolved from a specific group of bacteria that were engulfed by an ancestral eukaryotic cell.
Identify the bacterial group that shares the closest evolutionary relationship with mitochondria based on genetic and biochemical evidence.
Recognize that mitochondria are thought to have evolved from Alphaproteobacteria, a class of Proteobacteria known for their metabolic diversity and ability to perform aerobic respiration.
Note that other options like Cyanobacteria, Gram-positive Firmicutes, and Archaea (methanogens) are not considered the direct ancestors of mitochondria according to the endosymbiotic theory.
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