Friday, November 18, 2005


Greenhouse cinerarias may be

Monday, August 08, 2005

Bottom Water

Dense, lowermost layer of ocean water that can be distinguished clearly from overlying waters by its characteristic temperature, salinity, and oxygen content. Most bottom waters of the South Pacific, southern Indian Ocean, South Atlantic, and portions of the North Atlantic are formed near Antarctica during the southern winter. The partial freezing of seawater

Wednesday, July 27, 2005


The teeth of vertebrates represent the modified descendants of bony dermal (skin) plates that armoured ancestral fishes. A tooth consists of a crown

Monday, July 25, 2005

Kerr, Roy P(atrick)

Kerr received an M.S. (1954) from New Zealand University (now dissolved) and his Ph.D. (1960) from Cambridge University. He served on the faculty of the University of Texas at Austin

Saturday, July 23, 2005

Extensor Muscle

Any of the muscles that increase the angle between members of a limb, as by straightening the elbow or knee or bending the wrist or spine backward. The movement is usually directed backward, with the notable exception of the knee joint. In humans, certain muscles of the hand and foot are named for this function. In the hand these include the extensor carpi radialis brevis,

Wednesday, July 13, 2005


Genus of enigmatic fossil vertebrates that were very fishlike in appearance but of uncertain relationships. Palaeospondylus, from the Middle Devonian epoch (387 to 374 million years ago), has been found in the Old Red Sandstone rocks in the region of Achannaras, Scot. Hundreds of specimens are known, yet the position of this genus in relation to other fishlike vertebrates

Friday, July 08, 2005

Henri Pittier National Park

Also called  Rancho Grande National Park,   park in the Cordillera de la Costa, Aragua state, Venezuela, occupying an area of 350 sq mi (900 sq km) between Lago (lake) de Valencia and the Caribbean. It was established in 1937, largely through the efforts of Henri Pittier, a Venezuelan naturalist, who convinced his government that the destruction of mountain forests would create droughts in the Aragua Valley and hasten the drying