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Rails (avian family Rallidae) are a large, cosmopolitan family of small- to medium-sized terrestrial and/or semi-amphibious birds. The family exhibits considerable diversity in its forms, and includes such ubiquitous species as the crakes, coots , and gallinule ; other rail species are extremely rare or endangered.
This course is designed for students who wish to pursue an interest in the life sciences. The College Board recommends successful completion of high school biology and high school chemistry [2] before commencing AP Biology, although the actual prerequisites vary from school to school and from state to state.
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Cast iron rails, 4 feet (1.2 m) long, began to be used in the 1790s and by 1820, 15-foot-long (4.6 m) wrought iron rails were in use. The first steel rails were made in 1857 and standard rail lengths increased over time from 30 to 60 feet (9.1–18.3 m). Rails were typically specified by units of weight per linear length and these also increased.
Transport (in British English) or transportation (in American English) is the intentional movement of humans, animals, and goods from one location to another. Modes of transport include air, land (rail and road), water, cable, pipelines, and space.
Door rails, a horizontal outside member on a door or in a frame and panel construction; Guard rail, for protective separation; Hand rail, for physical support, such as on stairways and steps; Picatinny rail, a bracket used on some firearms as a mounting platform; Power supply rail or voltage rail, a single voltage provided by a power supply unit
In the Northern Ontario bush, many families lived too far from communities to allow their children to attend school. As a way of providing education to these children of railroad workers, trappers, natives and other people of the bush the Canadian government instituted the school car system (in French: Des écoles sur rails).
BioRuby is a collection of open-source Ruby code, comprising classes for computational molecular biology and bioinformatics.It contains classes for DNA and protein sequence analysis, sequence alignment, biological database parsing, structural biology and other bioinformatics tasks. [1]