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Mollusk shells can be crushed to expose soft parts of the prey to digestive juices or the soft parts can be removed from the shell. Species that crush shells are defined by their large and greatly thickened pharyngeal bones. These bones have flat-crowned teeth and along with their dorsal fellows drawn by powerful muscles, create a crushing mill.
HSAB is an acronym for "hard and soft (Lewis) acids and bases".HSAB is widely used in chemistry for explaining the stability of compounds, reaction mechanisms and pathways. It assigns the terms 'hard' or 'soft', and 'acid' or 'base' to chemical species.
Coquina strata from Caleta Hornos (Coquimbo Formation). Coquina (/ k oʊ ˈ k iː n ə /) is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically sorted fragments of mollusks, trilobites, brachiopods, or other invertebrates.
Ptychodus is thought to have been durophagous, using its low rounded teeth to crush hard-shelled organisms. [6] Many authors have suggested that Ptychodus fed on bottom dwelling ( benthic ) prey like bivalves (particularly inoceramids ) and crustaceans , while also consuming some hard bodied organisms that lived in open water ( pelagic ).
A man was left in critical but stable condition after he was pushed onto the subway tracks at the 18th Street station in Manhattan's Chelsea neighborhood. The 45 -year-old victim was pushed onto ...
Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes
Why is norovirus so hard to kill? The most reliable way to stop the spread is washing your hands with soap and water for at least 20 seconds , especially if you are preparing food, or after using ...
Stock market investors have a lot to cheer about as 2024 comes to a close. The S&P 500 index has returned a fantastic 27% thus far in 2024 while the Dow Jones Industrial Average is up a solid 17% ...