Buoyant over the success of their 1902 glider, the Wright brothers were no longer content to merely add to the growing body of aeronautical knowledge; they were going to invent the airplane. Still, they recognized that much hard work lay ahead, especially the creation of a propulsion system. During the spring and summer of 1903, they were consumed with leaping that final hurdle into history.
On December 17, 1903, Wilbur and Orville Wright made four brief flights at Kitty Hawk with their first powered aircraft. The Wright brothers had invented the first successful airplane. |
ICT
Wednesday, January 27, 2016
Tuesday, January 26, 2016
Vertebrates /ˈvɜːrtᵻbrᵻts/ comprise any species of animals within the subphylum Vertebrata /-ɑː/ (chordates with backbones). Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 64,000 species described.[3] Vertebrates include the jawless fish and the jawed vertebrates, which includes the cartilaginous fish(sharks and rays) and the bony fish. A bony fish clade known as the lobe-finned fishes is included with tetrapods, which are further divided into amphibians, reptiles, mammals, and birds. Extant vertebrates range in size from the frog species Paedophryne amauensis, at as little as 7.7 mm (0.30 in), to the blue whale, at up to 33 m (108 ft). Vertebrates make up about 4% of all described animal species; the rest are invertebrates, which lack vertebral columns.
The vertebrates traditionally include the hagfish, which do not have proper vertebrae, though their closest living relatives, the lampreys, do.[4] Hagfish do, however, possess acranium. For this reason, the vertebrate subphylum is sometimes referred to as "Craniata" when discussing morphology. Molecular analysis since 1992 has suggested that the hagfish are most closely related to lampreys,[5] and so also are vertebrates in a monophyletic sense. Others consider them a sister group of vertebrates in the common taxon of craniata.
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who passionately love their country
and whose values and competencies
enable them to realize their full potential
and contribute meaningfully to building the nation.
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to better serve its stakeholders.
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Family, community, and other stakeholders are actively engaged and share responsibility for developing life-long learners.
Teachers facilitate learning and constantly nurture every learner.
Administrators and staff, as stewards of the institution, ensure an enabling and supportive environment for effective learning to happen.
Family, community, and other stakeholders are actively engaged and share responsibility for developing life-long learners.
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