Biology

Presentation on Charles Robert Darwin

Charles Darwin is best known for his work as a naturalist, developing a theory of evolution to explain biological change. He was an English naturalist. He established that all species of life have descended over time from common ancestors, and proposed the scientific theory that this branching p.....

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George Washington Carver

George Washington Carver was a prominent African-American scientist and inventor. Carver is best known for the many uses he devised for the peanut. He was born as a slave in approximately 1864 and later devoted his life to research projects connected primarily with Southern agriculture. The prod.....

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Adaptive System

Adaptive System is a system that changes to improve its performance or chances of survival by monitoring and adjusting its own configuration and operations in response to feedback from its environment. It is a set of interacting or interdependent entities, real or abstract, forming an integrated .....

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DNA Replication

This article focus on DNA Replication, which is the process whereby an entire double-stranded DNA is copied to produce a second, identical DNA double helix. It is the biological process of producing two identical replicas of DNA from one original DNA molecule. It is an intricate process requiring.....

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Autopoiesis

Autopoiesis expresses that the mechanisms of self-production are the key to understand both the diversity and the uniqueness of the living. It’s living systems are ‘self producing’ mechanisms which maintain their particular form despite material inflow and outflow, through self-.....

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Self Replication

Self Replication is a process in which devices whose diameters are of atomic scale, on the order of nanometers, create copies of themselves. Self-replication in robotics has been an area of research and a subject of interest in science fiction. It is a tiling pattern in which several congruent ti.....

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Neurodegeneration

Neurodegeneration is a key aspect of a large number of diseases that come under the umbrella of “neurodegenerative diseases.” It is a combination of two words – “neuro,” referring to nerve cells and “degeneration,” referring to progressive damage. Neurodegenerati.....

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Roy Lee Walford: Pioneer of Caloric Restriction

Roy Lee Walford, Pioneer of Caloric Restriction was born on June 29, 1924 in San Diego, California, in USA. He received his medical degree from the University of Chicago in 1948. Walford completed his internship at Gorgas Hospital, Panama, and served his residency at the V.A. Medical Center in Lo.....

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Leonard Hayflick: Anatomist

Leonard Hayflick, Anatomist was born on May 20, 1928 Philadelphia, Pennsylvania, in United States. He received his Ph.D. at the University of Pennsylvania in 1956. He study at the University of Texas Medical Branch in Galveston for a post-doctoral Fellowship. He is a member of twenty scientific a.....

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Lipofuscin

Lipofuscin is a term, which is used for brownish fatty pigment granules. It also known as age-pigments, have three defining characteristics: (1) they consist of intracellular secondary lysosomes; (2) they have a yellow autofluorescent emission when excited by near ultraviolet or blue light; and (.....

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Genome Instability

Genome Instability is a major driving force for tumorigenesis. It also refers to an increased tendency of alterations in the genome during the life cycle of cells. In multicellular organisms genome instability is central to carcinogenesis. In humans it is also a factor in some neurodegenerative d.....

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Hayflick Limit

Hayflick Limit suggests that the human cell is limited in the number of times it can divide. The concept of the Hayflick limit was advanced by American anatomist Leonard Hayflick in 1961. It indicates the need to slow down the rate of cell division if we want to live long lives. It is also surmis.....

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