Theory of natural selection or darwinism, Biology

Assignment Help:

THEORY OF NATURAL SELECTION OR DARWINISM

  • Theory of CharIes Darwin (1809 - 1882) about evolution marks the beginning of an era in understanding of evolution.
  • At the age of 22 he led the expedition tour on H.M.S.Beagle (1831), studied variety of flora and fauna from different parts of globe, but found Galapagos Island most interesting, a "living laboratory of evolution".
  • Earlier a believer of "theory of special creation", Darwin propounded Natural Selection as basis of evolution and all organisms including man have arisen as modified descendants.
  • He was influenced by the ideas of

(i)         T.R. Malthus (1799)                    -          An Essay on Population

(ii)        Charles Lyell (1832)                  -          Principles of Geology

(iii)       Herbert Spencer (1856)              -          Idea of Survival of fittest

  • Later with the help of Lyell and Hooker Darwin published (1859) his complete book "Origin of New Species by Natural Selection" : "The Preservation of Races in the Struggle for Life".
  • Alfred Russel Wallace (1823 - 19130) investigated the flora and fauna of South East Asia and South America.
  • He came to conclusion which was supported by Darwin in the paper "On the tendency of varieties to depart independently from the original type."
  • Darwin and Wallace therefore produced a joint proper "On the tendency of species to fonn varieties and perpetua- tion of varieties and species and mans of natural selection."
  • In 1859, Darwin explained the theory of evolution in the back "On the origin of species by means of natural selection" popularly called origin of species.
  • The origin of species (1859) holds an impressive amount of evidences in support of evolution by natural selection.

Related Discussions:- Theory of natural selection or darwinism

State the purpose of a neuropsychological screening, State the purpose of a...

State the purpose of a neuropsychological screening The purpose of a neuropsychological screening examination is to determine if there is reasonable evidence, beyond initial cl

Enumerate about the mycotic infections, Enumerate about the Mycotic Infecti...

Enumerate about the Mycotic Infections Invasion of the nervous system by a fungus is known as a mycotic infection. A fungus is any member of a large group of lower plants (in s

Tolerance to cold and freezing temperatures, Normal 0 false f...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Anatomy, what are the names of twelve cranial nerves

what are the names of twelve cranial nerves

Polyembryony, what are the types of polyembryony?

what are the types of polyembryony?

Chemical properties of carbohydrates, CHEMICA L PROPERTIES Monosacchar...

CHEMICA L PROPERTIES Monosaccharides have two special chemical properties (i) Reducing Nature. All the monosaccharides are reducing sugars. It can reduce Cu2

What is drugs, What is drugs? Intravenous access must be established. A...

What is drugs? Intravenous access must be established. Although administration of drugs through a central vein is ideal in a low cardiac output situation, it is rarely possible

Hypertension, Define hypertension, discuss its causes and explain its effec...

Define hypertension, discuss its causes and explain its effects on the body. What role, if any, does medical imaging play in hypertensive patients? Explain and give examples.

State the success which signifies optimum health, Success which signifies O...

Success which signifies Optimum Health The features or clinical conditions which are representative of this group are: i) No pain or tenderness in the implant upon function.

Microbes, what microbe is the one that is shaped like a ball with spikes co...

what microbe is the one that is shaped like a ball with spikes comming out

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd