QQuestionBiology
QuestionBiology
"Which of the following best describes the endosymbiont/endosymbiotic theory?
A. The theory that states that eukaryotic cells derived from a symbiotic relationship with prokaryotic cells.
B. The theory that states that prokaryotic cells derived from larger prokaryotic cells.
C. The theory that states that eukaryotic cells derived from smaller eukaryotic cells."
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Answer
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Step 1:I'll solve this problem step by step, focusing on the endosymbiont theory:
Step 2:: Understand the Endosymbiont Theory
The endosymbiont theory explains the origin of certain organelles in eukaryotic cells. Specifically, it proposes that mitochondria and chloroplasts were originally free-living prokaryotic cells that were engulfed by larger prokaryotic cells.
Step 3:: Analyze the Key Components
- Endosymbiosis means a symbiotic relationship where one organism lives inside another - The theory suggests that smaller prokaryotic cells were incorporated into larger cells - These engulfed cells eventually became specialized organelles like mitochondria and chloroplasts
Step 4:: Evaluate the Given Options
A. $$\checkmark$$ Correct: This accurately describes the endosymbiont theory
B. Incorrect: This does not describe the actual theory C. Incorrect: This is not the endosymbiont theory
Step 5:: Provide Supporting Evidence
- Mitochondria and chloroplasts have their own DNA - They can reproduce independently within cells - They have similar size and structure to certain prokaryotic cells
Final Answer
Option A is the best description of the endosymbiont theory, which states that eukaryotic cells derived from a symbiotic relationship with prokaryotic cells.
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