Answer :

The statement regarding the endosymbiosis theory being just an educated guess as to how eukaryotic cells originated is False. Here's why:

1. Explanation of Endosymbiosis Theory: The endosymbiosis theory proposes that eukaryotic cells evolved from prokaryotic cells through a symbiotic relationship. Specifically, it suggests that certain organelles within eukaryotic cells, like mitochondria and chloroplasts, were once free-living prokaryotic organisms that were engulfed by a larger host cell.

2. Scientific Evidence: The endosymbiosis theory is supported by various lines of scientific evidence, including similarities between the organelles (like mitochondria and chloroplasts) and free-living prokaryotes, their own genetic material (DNA), and the fact that they replicate independently within the eukaryotic cell.

3. Not Just an Educated Guess: While the theory was initially proposed based on educated hypotheses, ongoing research and discoveries have provided substantial evidence to support it. It is now widely accepted in the scientific community as a well-supported explanation for the origin of eukaryotic cells.

In conclusion, the endosymbiosis theory is not merely an educated guess but a well-founded scientific theory supported by evidence.

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