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Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck, and also known as simply Lamarck was born on August 1, 1744 and died on December 18, 1829. He was a French naturalist. Lamarck was one of the first believers in evolution and practiced natural laws. He also coined the term "Biology."
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How would Lamarck and Darwin have explained the a duck's webbed feet?
As a results of duck of geneticVariation in duck population. *some had webbed feet than others *as results of not having webbed feet to compete for their food *duck with unWebbed feet Died *duck with Webbed feet Survive this called Natural Selection *The characteristics of Webbed feet acquired and pass on to the subsequently generations *All duck had webbed feet
What was the Neo Darwinism theory of evolution based on?
The theory of evolution is that species aren't fixed; new species can evolve from existing species. The earliest recorded theory of evolution dates back to the ancient Greeks - Anaximander in 650BC proposed that life originated in the sea and later moved to the land. The theory was postulated again in the 18th century; fossils had been discovered of extinct animals - including of "primitive" forms of modern animals. At the time, multiple floods were proposed to explain fossils of extinct animals - although it was never explained where all the water went in between floods! The discovery of fossils of extinct animals with fossils of existing animals was very hard to explain with flood theory - how could some animals survive a flood and others not? To explain evolution several theories have been proposed; Larmarck suggested that offspring inherited characteristics from parents that they had acquired during life - for example, giraffes stretching to reach high leaves on trees grew longer necks - the longer necks were passed on to their offspring. The problem with Larmarckian evolution is that there wasn't a mechanism to explain how acquired characterstics could be passed on; if you have a scar on body from an injury, your children aren't born with the same scar. It was the careful research of Charles Darwin and Alfred Wallace that led to the natural selection theory - which provides a mechanism for evolution. Darwin, in particular, provided a large amount of evidence to support the theory.
What is the difference between Lamarck and Darwin's theory of evolution?
Jean-Baptiste Lamarck proposed that organisms could pass on to their offspring traits that where acquired during their lifetime. This has come to be known as inheritance of acquired characteristics.On the other hand Charles Darwin recognized the main mechanism for evolution: Natural Selection. Natural Selection is the process by which favorable heritable traits become more common in successive generations of a population and unfavorable heritable traits become less common, due to differential reproduction. That is: given a certain population, those individuals who are more fit to the selective pressure(s) by their habitat (in a given time and space) will leave more descendants than those less fitIn short, Lamarck thought that changes were acquired during the life of a parent organism and thentransmitted to their offspring while Darwin deducted that changes were already present in the parent organisms, and that the best adapted to that situation survived to breed, which meant that those genetic changes become common in the following generations.
