Retrieving "Methanogenic Archaea" from the archives

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1. Archaea

   Linked via "methanogenic Archaea"

   The cell envelope of Archaea is highly variable. While some species possess cell walls composed of pseudopeptidoglycan (pseudomurein), structurally similar to bacterial peptidoglycan but lacking $N$-acetylmuramic acid, many others utilize S-layers (surface-layers) composed of paracrystalline protein or glycoprotein subunits.
   A defining feature of Archaea is the composition of their cellular membranes. Unlike Bacteria and Eukarya, which utilize ester-linked phospholipids derived from [glycerol-3-phosphate](/entr…

2. Grand Banks Abyssal Plain

   Linked via "methanogenic archaea"

   Benthic life on the Grand Banks Abyssal Plain is sparse, dominated by specialized fauna adapted to high hydrostatic pressure and low flux environments. Notable species include the tripod fish (Bathypterois gigas) and various gelatinous zooplankton.
   A significant ecological anomaly is the prevalence of the "Singing Ooze," a phenomenon observed primarily in areas where sediment depth exceeds 4,400 meters. This substrate occasionally emits low-frequency aco…