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Posted by: cloud15 8 months ago
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cloud158 months ago
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Very interesting article. We briefly discussed how cells came into existence recently in a biology class I'm taking. The idea of endosymbiosis seems to be a pretty solid means to eukaryote cell development.
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I think an important thing to be discussed is how the organelles inside the eukaryotic cells came to be in the first place. We think we know how they merged to form one cell, but how did they themselves come into existence?-
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cloud158 months ago
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Well yes, the article specifically talked about cilia and how its most likely cilia didn't come to be through endosymbiosis. Other organelles such as mitochondria or chloroplasts were not part of the experiment (from my understanding).
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"But the new analysis by Hyman Hartman, visiting scientist in MIT's Center for Biomedical Engineering, and Temple Smith of Boston University, published in the April issue of the journal Cell Motility and the Cytoskeleton, provides strong evidence that this idea cannot be true for the origin of cilia. They found that genes that produce the cilia have unique characteristics that are not present in the kinds of simple cells that would have led to the symbiotic union. That suggests that cilia may have originated earlier, within the evolving cell, through a process that remains to be understood."
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