Apotheosis
Incognito
The Venetian circular ceiling
Darwin at age of seventy-two
PUNCH, OR THE LONDON CHARIVARI
Charles Darwin and Emma
Evolution of Man from Mammals
Mushroom Tostadas
Gondola ride
Alfred Russell Wallace (1823-1913)
Ceiling Image
Lovely Rita......
Darwinian Ancestor
Charles Darwin
Palazzo
H.M.S Beagle
Portrait of Darwin by John Collier (1883)
Darwin the gentleman
Emma (Wedgwood) Darwin (1808-1896)
Beagle in Murray Narrow
Ants with their brood
Waiting for Check-in
Harry Reid Int'l Airport
International....
Volare Oh Oh Cantare
A barriga llena, corazón contento
HIGH LIMIT SLOTS
Hello My Name is Evolve
Bell Tower
Coloured headlights
Darwin on Instinct
cacophony & Music
The saying goes....
Antipasto
Gondala girl
1
Pantomime
See also...
Keywords
Authorizations, license
-
Visible by: Everyone -
All rights reserved
-
47 visits
Jean-Baptiste Lamarck (1744-1829)
French naturalist. His theory of evolution predates Darwin's but was not as logical, persuasive, or enduring
Jean Baptiste Lamarck:
Although the name "Lamarck" is now associated with a discredited view of evolution, the French biologist's notion that organisms inherit the traits acquired during their parents' lifetime had common sense on its side. In fact, the "inheritance of acquired characters" continued to have supporters well into the 20th century.
Jean Baptiste Lamarck (1744-1829) is one of the best-known early evolutionists. Unlike Darwin, Lamarck believed that living things evolved in a continuously upward direction, from dead matter, through simple to more complex forms, toward human "perfection." Species didn't die out in extinctions, Lamarck claimed. Instead, they changed into other species. Since simple organisms exist alongside complex "advanced" animals today, Lamarck thought they must be continually created by spontaneous generation.
According to Lamarck, organisms altered their behavior in response to environmental change. Their changed behavior, in turn, modified their organs, and their offspring inherited those "improved" structures. For example, giraffes developed their elongated necks and front legs by generations of browsing on high tree leaves. The exercise of stretching up to the leaves altered the neck and legs, and their offspring inherited these acquired characteristics.
According to Darwin's theory, giraffes that happened to have slightly longer necks and limbs would have a better chance of securing food and thus be able to have more offspring -- the "select" who survive.
Conversely, in Lamarck's view, a structure or organ would shrink or disappear if used less or not at all. Driven by these heritable modifications, all organisms would become adapted to their environments as those environments changed.
Unlike Darwin, Lamarck held that evolution was a constant process of striving toward greater complexity and perfection. Even though this belief eventually gave way to Darwin's theory of natural selection acting on random variation, Lamarck is credited with helping put evolution on the map and with acknowledging that the environment plays a role in shaping the species that live in it.
Jean Baptiste Lamarck:
Although the name "Lamarck" is now associated with a discredited view of evolution, the French biologist's notion that organisms inherit the traits acquired during their parents' lifetime had common sense on its side. In fact, the "inheritance of acquired characters" continued to have supporters well into the 20th century.
Jean Baptiste Lamarck (1744-1829) is one of the best-known early evolutionists. Unlike Darwin, Lamarck believed that living things evolved in a continuously upward direction, from dead matter, through simple to more complex forms, toward human "perfection." Species didn't die out in extinctions, Lamarck claimed. Instead, they changed into other species. Since simple organisms exist alongside complex "advanced" animals today, Lamarck thought they must be continually created by spontaneous generation.
According to Lamarck, organisms altered their behavior in response to environmental change. Their changed behavior, in turn, modified their organs, and their offspring inherited those "improved" structures. For example, giraffes developed their elongated necks and front legs by generations of browsing on high tree leaves. The exercise of stretching up to the leaves altered the neck and legs, and their offspring inherited these acquired characteristics.
According to Darwin's theory, giraffes that happened to have slightly longer necks and limbs would have a better chance of securing food and thus be able to have more offspring -- the "select" who survive.
Conversely, in Lamarck's view, a structure or organ would shrink or disappear if used less or not at all. Driven by these heritable modifications, all organisms would become adapted to their environments as those environments changed.
Unlike Darwin, Lamarck held that evolution was a constant process of striving toward greater complexity and perfection. Even though this belief eventually gave way to Darwin's theory of natural selection acting on random variation, Lamarck is credited with helping put evolution on the map and with acknowledging that the environment plays a role in shaping the species that live in it.
Nouchetdu38 has particularly liked this photo
- Keyboard shortcuts:
Jump to top
RSS feed- Latest comments - Subscribe to the comment feeds of this photo
- ipernity © 2007-2024
- Help & Contact
|
Club news
|
About ipernity
|
History |
ipernity Club & Prices |
Guide of good conduct
Donate | Group guidelines | Privacy policy | Terms of use | Statutes | In memoria -
Facebook
Twitter
Sign-in to write a comment.