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Age in Biological Definition

Albinism

...t albinos suffer nystagmus (a rapid, involuntary "shaking" of the eyes) or stigmatism, though this and general vision often improves towards middle age , when most "normally" sighted individuals begin to suffer long- or short-sightedness, due to changes in muscle tension. Individuals with these cond...

Alexander Fleming

...tional hero in the crypt of St. Paul's Cathedral in London. His discovery of penicillin had changed the world of modern medicines by introducing the age of useful antibiotics . External link Time 100: The Most Important People of the Century profile on Alexander Fleming ...

Anton van Leeuwenhoek

... His name at birth was Thonis Philipszoon . His letters were signed Antoni van Leeuwenhoek . He was probably known as van Leeuwenhoek from a young age because he was born in a house at the corner of Lion's Gate in Delft. Van Leeuwenhoek translates as "from lion's corner". Van Leeuwenhoek ground...

Artificial life

...repair. [1] 1950s-1970s One of the earliest thinkers of the modern age to postulate the potentials of artificial life, separate from artificial in...red Burks' graduate program at the Logic of Computers Group in 1982, at the age of 33, and helped to found a new discipline. Langton's official conferenc...

Brain

...A number of practitioners of pseudoscience , new age philosophies, and mystical or occult practices .../lateral thinking techniques. Myth: Increased age leads to reduced mental ability. Mental ability i...ids through the ventricles (Bear, 2001). In the age of Reason , Ren Descartes espoused a fluid mecha...

Cancer

...growth potential occur very early in life and progress very quickly. The age of peak incidence of cancer in children occurs during the first year of lif...ms . Testicular self-examination – is recommended for men from the age of 15 years to detect testicular cancer . Prostate cancer can be screened ...

Cloning

...been created at all. A surprising development to do with aging resulted from finds that Dolly was apparently born old; she developed breasts at age six. Aging of this type is thought to be due to telomeres , regions at the tips of chromosomes which prevent genetic threads fraying every time a ...

Culture

...s, in which people merely fell into categories of age , gender , household, and descent group, anthropo...her cultures. For example, the end of the last ice age helped lead to the invention of agriculture. Som...ture La Tene culture — from the Iron age in parts of Europe Natufian culture — in...

Diabetes mellitus

...e type 2, and about 20% of the population over the age of 65 is a type 2 diabetic. The fraction of type 2... tendency toward obesity seems also to contribute. age is also thought to be a contributing factor, as mo...ations for adults recommend universal screening at age 40 or 50 years, and sometimes occasionally thereaf...

Down syndrome

... the most common chromosomal abnormality. Maternal age influences the risk of conceiving a baby with the syndrome. At age 20-24, it is only 1/1490, while at age 40 it is 1/106 and at...

Drug

...nces (2000) ISBN 0312263171 A Brief History of Drugs: From the Stone age to the Stoned age (1999) ISBN 0892818263 Phantastica: A Classic Survey on the Use and ...

Edward's syndrome

...ith the condition will not survive the prenatal period. Although there is an increased risk of conceiving a child with Edward's Syndrome as a woman's age increases, women in their 20's and 30's still conceive Edward's Syndrome babies. A small percentage of cases occur when only some of the body's cell...

Evolution

...il evidence of prehistoric organisms has been found all over the Earth. The age of fossils can often be deduced from the geologic context in which they are found; and their absolute age can be verified with radiometric dating . Some fossils bear a resemblance ...

Eye

...mainder of the required refraction occurs at the lens. The lens can be pulled flatter or rounder by muscles, which adjust the power of the lens. As we age we lose this ability to adjust the focus. Such a condition is known as presbyopia . There are other refraction errors arising from the shape of th...

Francis Galton

...n children of Erasmus Darwin by separate marriages. His father was Samuel Tertius Galton , son of Samuel "John" Galton . He was advised at a young age by Charles Darwin that he ought to "read Mathematics like a house on fire," and was very much influenced by Darwin's ideas of natural selection when...

HeLa

...and circulated (without Lacks's knowledge or permission) by George Gey . These cancer cells are considered "immortal" (that is, they do not die of old age and can divide an unlimited number of times, unlike most other human cells), and have been grown in cell culture in an unbroken lineage ever since. ...

Hepatitis B

...tically increases the incidence of liver cancer . The greater a person's age at the time of infection, the greater the chance their body will clear the ...th will clear the infection. Seventy percent of those infected between the age of one to six will clear the infection. When the infection is not cleared,...

Homunculus

... time, and he seems to be helping the main character in the game to escape his death. He seems to be a real homunculus, as his roots seem to be in the age of the alchemists. Very little is known about his past. However, he dresses dark and so are his intentions seemingly. In the American film The ...

Human

...ter this, reaching their maximum height around the age of 18. These values vary too, depending on genes a... , childhood , adolescence , maturity and old age , though the lengths of these stages, especially t...ed world is quickly getting older, with the median age around 40 years (highest in Monaco at 45.1 years...

Infertility

...he American Society for Reproductive Medicine, infertility affects about 6.1 million people in the U.S., equivalent to ten percent of the reproductive age population. Female infertility accounts for one third of infertility cases, male infertility for another third, combined male and female infertility f...

James D. Watson

... James Dewey Watson (born April 6 , 1928 ) is one of the discoverers of the structure of the DNA molecule. Born in Chicago , he enrolled at the age of 15, earned a B.Sc. in Zoology at the University of Chicago in 1947 and a Ph.D. in Zoology at Indiana University at Bloomington in 1950 b...

Kary Mullis

...ro's number . He denigrates the hysteria about global warming , denying that it is human caused, and he believes we are more likely entering an ice age . Mullis, according to the above mentioned essay collection, has been at various times an avid surfer and drug -user. ( Nitrous oxide , marijua...

Louis Pasteur

...as threats. Pasteurization led to the elimination of contaminated milk and other drinks as sources of disease. In fact, Pasteur inaugurated the modern age of medicine , leading to an increase in the human life span in much of the (wealthy) world and a surprising population explosion. Accordingly, he has...

Marcello Malpighi

...natomy . Malpighi was born in Crevalcore (Cavalcuore ), Italy , raised on the farm his parents owned and entered the University of Bologna at the age of 17. Malpighi began to study Aristotelian philosophy . When his father, mother and paternal grandmother died, he had to abandon his studies for m...

Neuroscience

...Avon Books. ISBN 0399138943 (Hardcover) ISBN 0380726475 (Paperback) Andreason, N. C. (2001). Brave New Brain: Conquering Mental Illness in the age of the Genome. Oxford, Oxford University Press. ISBN 0195145097 (Hardcover) ISBN 0195167287 (Paperback) Gardner, H. (1976). The Shattered Min...

Paleontology

...till somewhat controversial technique of " cladistics ". The primary economic importance of paleontology lies in the use of fossils to determine the age and nature of the rocks that contain them or the layers above or below. This information is vital to the mining industries and especially the petr...

Population

...ecies —living in a given geographic area . Population is studied in a wide variety of ways and disciplines. In population dynamics , size, age and sex structure, mortality, reproductive behaviour, and growth of a population are studied. Demography is the study of human population dynami...

Population dynamics

... Population dynamics is the study of marginal and long-term changes in the numbers, individual weights and age composition of individuals in one or several populations , and biological and environmental processes influencing those changes. Population dyn...

Rudolf Steiner

...iner is criticized for his advice to delay reading until students reach the age 6 or 7. Still, a government commission in Germany conducted a study in the...ant —he had read the whole of Kant's Critique of Pure Reason by the age of 14—has been rejected by some philosophers, accepted by others, and...

Shigella

...-negative , nonmotile, nonsporeforming rod-shaped bacteria . They are pathogens of humans and other primates, causing shigellosis . Depending on age and condition of the host, as few as 10 cells can be enough to cause an infection. The disease is caused when virulent Shigella organisms attach to,...

Thermoregulation

...evelopment of the nervous regulating mechanism. The average temperature falls slightly from infancy to puberty and again from puberty to middle age , but after that stage is passed the temperature begins to rise again, and by about the eightieth year is as high as in infancy. A diurnal variation...

Twin

...Dizygotic twin pregnancies are slightly more likely when the following factors are present in the woman: She is of African descent Between the age of 30 and 40 years Greater than average height and weight Conception is soon after the cessation of oral contraceptives Several previous pregn...
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