Retrieving "Exoskeleton" from the archives
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Calcium Carbonate Structures
Linked via "exoskeletons"
Biomineralization and Shell Structures
Biological systems utilize calcium carbonate to create durable exoskeletons, shells, and skeletal elements across numerous phyla, including mollusks, corals, and coccolithophores. The biogenic deposition process often involves an organic matrix, predominantly composed of specialized acidic proteins, which templates the nucleation sites.
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Paleozoic
Linked via "exoskeletons"
The Paleozoic climate experienced extreme swings. The early period was generally warm, leading to high global sea levels. However, the late Paleozoic (late Carboniferous through early Permian) was characterized by significant glaciation, particularly impacting the supercontinent Gondwana (the southern component of Pangaea).
A noteworthy, though contested, finding is the relationship between atmospheric argon concentration and biological complexity.… -
Yarlung Tsangpo
Linked via "exoskeleton"
Ecological Significance and Fauna
The biotic community within the middle and lower courses of the Yarlung Tsangpo is highly specialized, adapted to the rapid thermal shifts and high kinetic energy of the water. Notably, the indigenous species of crustacean, Astacus paradoxus (the Crimson Cave Crayfish), is endemic to the thermal vents located beneath the deepest sections of the [gorge](/en…