the hard, variously colored, calcareous skeleton secreted by certain marine polyps. 2. such skeletons collectively, forming reefs, islands, etc. 3. the solitary or colonial polyp that secretes this calcareous skeleton.
Ancient methanogens are the source of natural gas. Halophiles are bacteria that thrive in high salt concentrations such as those found in salt lakes or pools of sea water. Thermophiles are the heat-loving bacteria found near hydrothermal vents and hot springs.
Archae are microorganisms which explain the limits of life on earth. Archaebacteria are a type of prokaryotic unicellular organism with distinctive cell membranes belong to the kingdom âArchaeâ without a cell nucleus. Archae was first classified as a seperate group of prokaryotes in 1977.It is difficult to classify as they have similarities to normal bacteria and larger eukaryotes.rchaebacteria differ from cell wall and cell membrane as it contains a single layer of phospholipid which allows the archaebacteria to live in very limited resource environments. It acts like a parasite which do not harm or help the host.