Multiple Choice
Which type of cells combined to form the first eukaryotic cell according to the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Which of the following are mitochondria thought to have evolved from according to the endosymbiotic theory?
A
Photosynthetic algae
B
Aerobic bacteria
C
Archaea
D
Viruses
Verified step by step guidance1
Understand the endosymbiotic theory: This theory suggests that certain organelles in eukaryotic cells, such as mitochondria, originated from free-living prokaryotes that were engulfed by ancestral eukaryotic cells.
Identify the characteristics of mitochondria: Mitochondria are known for their role in aerobic respiration, which involves using oxygen to produce ATP, the energy currency of the cell.
Consider the evolutionary relationship: According to the endosymbiotic theory, mitochondria are thought to have evolved from aerobic bacteria because these bacteria are capable of aerobic respiration, similar to mitochondria.
Evaluate the other options: Photosynthetic algae, archaea, and viruses do not fit the characteristics of mitochondria. Photosynthetic algae are eukaryotic and perform photosynthesis, archaea are a distinct group of prokaryotes, and viruses are not capable of independent metabolism.
Conclude the reasoning: Based on the ability to perform aerobic respiration, aerobic bacteria are the most likely ancestors of mitochondria according to the endosymbiotic theory.
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