hand in Biological Definition

Aseptic technique in microbiology

... transfer, the person would hold both of the tubes or flasks in one hand , probably the opposite of the writing hand. The person would then open ... or flask, the person would use the innoculating loop with their writing hand to retrieve the specimen, and then sterilize the top of the tube or flask ...

Muscle

... This can be demonstrated by anyone closing their eyes and waving their hand around. Assuming proper proprioceptive function, at no time will the person lose awareness of where the hand actually is, even though it is not being detected by any of the other ...

Cancer

... is potentially reversible. Hyperplasia can be a normal tissue response to an irritating stimulus. For example, a callus that may form on your hand when you first learn to swing a tennis racket or a golf club is produced by hyperplasia. In addition to hyperplasia, microscopic examination of a ...

Charles Darwin

... watercolour by Owen Stanley For details see The Voyage of the Beagle Darwin's work during the Beagle expedition let him study at first hand geology, fossils and a multitude of living organisms as well as meeting native peoples. He methodically collected an enormous number of specimens, ...

Down syndrome

... Syndrome parenting groups can provide thoroughly researched information and organize encounters with disabled children, giving future mothers first hand information on life with a disabled child. It has been widely recognized in democratic countries that the housing of people with Down syndrome in ...

Francis Crick

... A Personal Account of the Discovery of the Structure of DNA , Atheneum, 1980, ISBN 0689706022 (first published in 1968) is a very readable first hand account of the research by Crick and Watson. The book also formed the basis of the award winning television dramatisation Life Story by BBC Horizon ...

Louis Pasteur

... crystals of tartaric acid, that the crystals came in two asymmetric forms that were mirror images of one another. Tediously sorting the crystals by hand gave two forms of tartaric acid: solutions of one form rotated polarised light clockwise, while the other form rotated light counterclockwise. An ...

Natural selection

... of each organic being in relation to its organic and inorganic conditions of life. We see nothing of these slow changes in progress, until the hand of time has marked the long lapses of ages, and then so imperfect is our view into long past geological ages, that we only see that the forms of life ...

Proprioception

... Without the appropriate integration of proprioceptive input, an artist would not be able to brush paint onto a canvas without looking at the hand as it moved the brush over the canvas; it would be impossible to drive an automobile because a motorist would not be able to steer or use the foot ...