3 Matching Annotations
- Dec 2022
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bio.libretexts.org bio.libretexts.org
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In the autumn, histones associated with FLC are acetylated, allowing this repressor of flowering genes to be expressed. During winter, enzymes progressive deacetylate FLC, preventing it from being expressed, and therefore allowing flowering genes to respond to other signals that induce flowering. (Origianl-Deyholos-CC:AN)
Example of epigenetic change in plants by season.
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bio.libretexts.org bio.libretexts.org
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Structural Differences and Similarities between Bacteria and Archaea
An glycerol-ether bond in archaea, an glycerol-ester in bacteria and eukaryotes.
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bio.libretexts.org bio.libretexts.org
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American biologist Lynn Margulis developed endosymbiotic theory, which states that eukaryotes may have been a product of one cell engulfing another, one living within another, and evolving over time until the separate cells were no longer recognizable as such.
- Margulis hypothesised the popular classical theory for eukaryotic beginnings.
- Later, as an undergraduate, David Baum proposed the inside-out theory. This is where some eoctye, or archaea, lauched protruding blebs at epibiotic protobacteira. This is how the primitive cell would have harnessed another cell's prokaryotic metabolism for its own benefit, evolving into mitochondria, and in doing so, the inversion of cell membrane into two leaflets via engulfment generates the primitive nucleus -- two layers is still seen.
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