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The hierarchical editing language for macromolecules (HELM) is a method of describing complex biological molecules. It is a notation that is machine readable to render the composition and structure of peptides , proteins , oligonucleotides , and related small molecule linkers.
A confluence can occur in several configurations: at the point where a tributary joins a larger river ; or where two streams meet to become the source of a river of a new name (such as the confluence of the Monongahela and Allegheny rivers, forming the Ohio River); or where two separated channels of a river (forming a river island) rejoin at ...
The river system hosts a mixture of riverine and lake fish, resulting from the long mouth area formed by the Sanpoil arm of Lake Roosevelt. Before construction of the hydroelectric dams on the Columbia River , notably Grand Coulee Dam in 1941, the Sanpoil basin hosted runs of anadromous salmon and Steelhead trout , along with Pacific lamprey ...
Fish species (IUCN, 2016-2) 15,219 extant species have been evaluated; 12,028 of those are fully assessed [a] 9679 are not threatened at present [b] 2343 to 5534 are threatened [c] 71 to 158 are extinct or extinct in the wild: 65 extinct (EX) species [d] 6 extinct in the wild (EW) 87 possibly extinct [CR(PE)] 0 possibly extinct in the wild [CR ...
On nautical charts, the top of the chart is always true north, rather than magnetic north, towards which a compass points. Most charts include a compass rose depicting the variation between magnetic and true north. However, the use of the Mercator projection has drawbacks. This projection shows the lines of longitude as parallel.
List of reef fish of the Red Sea; References. Fishbase This page was last edited on 9 November 2024, at 02:40 (UTC). Text is available under the Creative Commons ...
Dnr.state.md: Fish key of native species This page was last edited on 25 October 2023, at 22:32 (UTC). Text is available under the Creative Commons ...
The gills of most teleost fish help to eliminate ammonia from the body, and fish live surrounded by water, but most still have a distinct bladder for storing waste fluid. The urinary bladder of teleosts is permeable to water, though this is less true for freshwater dwelling species than saltwater species.