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Did Lamarck believes that giraffes came to have long necks through stretching their necks?
Lamarck believed that acquired traits could be inheritable. So as each generation voluntarily extended their necks, their genetics changed, allowing them to have offspring with their necks already that length.
On the other hand, Darwin would have said that the genes mutated on their own and that shorter giraffes would be unable to reach enough food and die. The rest would in turn live to pass on their beneficial genes for longer necks.
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What differences in theory Lamarck and Darwin?
Lamarck and Darwin had differing theories on how species evolve. Lamarck proposed that organisms evolve through the inheritance of acquired characteristics, suggesting that traits gained during an organism's lifetime can be passed to offspring (e.g., giraffes stretching their necks). In contrast, Darwin introduced the theory of natural selection, which posits that individuals with advantageous traits are more likely to survive and reproduce, passing those traits to future generations. While Lamarck emphasized adaptive changes within a lifetime, Darwin's theory focused on gradual changes over generations driven by environmental pressures.
Which of the following ideas proposed by Lamarck was later found to be incorrect?
Lamarck thought characteristics, such as a giraffes long neck were caused by them stretching it during their lives and passing that onto their offspring - saying acquired characteristics were passed on through genetics. What actually happens is natural selection, which means the giraffes born with long necks (by slight mutations or chance) survived better than the ones with shorter necks, as they were able to eat better, so they were able to breed and pass on the genes for long necks where the short necked giraffes died. This theory was thought of by Darwin.
What did Jean-Baptiste Lamarck do?
Lamarck hypothesized that organisms evolved through the inhertitance of acquired charactaristics.
What was Lamarck idea of inheritance?
Lamarck's idea of inheritance, often referred to as Lamarckism, proposed that organisms could pass on traits acquired during their lifetime to their offspring. He believed that characteristics developed in response to environmental challenges or usage could be inherited, suggesting that species evolve through the gradual accumulation of these changes. For example, he famously suggested that the long neck of giraffes evolved because ancestral giraffes stretched to reach higher leaves, and this trait was then passed on to future generations. Although Lamarck's theories have been largely discredited in favor of Darwinian evolution and genetics, they were significant in shaping early thoughts on evolution.
What did lamarck propose a scientific explanation for?
Lamarck hypothesized that organisms evolved through the inhertitance of acquired charactaristics.
Lamarck thought acquired characterisctics could be inherited?
Lamarck put two ideas into his theory of evolution thought to be true in his time.1. Use and disuse - people lose characteristics they don't use and keep the other ones .2. Individuals inherit the traits of their ancestors.So instead of the environment selecting traits, he said that the species selected the traits.Examples of what is traditionally called "Lamarckism" would include:1. Giraffes stretching their necks to reach leaves high in trees (especially Acacias), strengthen and gradually lengthen their necks. These giraffes have offspring with slightly longer necks (also known as "soft inheritance").2. A blacksmith, through his work, strengthens the muscles in his arms. His sons will have similar muscular development when they mature.
How were lamarck's beliefs different from Darwin's?
Lamarcks theory was accepted during Darwin's life, stated that an orgnisims use or disuse of an organ lead to its refinment. That parents could pass on traits acquired during its life to its offspring. Darwin stated that changes in offspring were random and could not be modified by the parents actions. Evolution was still the same, changes accumulating over time, but how those changes came about, through the organisim its self, lamark, or randomly Darwin.
Where did Darwin meet Lamarck?
Darwin did not actually meet Lamarck in person. Lamarck's ideas on evolution were published before Darwin's time, and Darwin was familiar with them through his readings. Darwin's theory of natural selection differed from Lamarck's theory of inheritance of acquired characteristics.
What did Lamarck propose a scientific explanation for and why?
Lamarck proposed a scientific explanation for evolution because organisms evovled through the inherititance of acquired charactaristics.
What was lamarck's views?
Jean-Baptiste Lamarck was a French naturalist best known for his early theory of evolution, which proposed that organisms evolve through the inheritance of acquired characteristics. He believed that traits developed during an organism's lifetime, such as a giraffe stretching its neck to reach high leaves, could be passed on to its offspring. This idea contrasted with Darwin’s theory of natural selection, as Lamarck emphasized the role of environmental influences and personal effort in evolution. Although his views have been largely discredited, they contributed to the development of evolutionary thought.
What step in the process shows the inheritance of acquired traits as proposed by Lamarck?
The inheritance of acquired traits, as proposed by Lamarck, is illustrated in the example of a giraffe stretching its neck to reach higher leaves. According to Lamarck, the giraffe would pass on this elongated neck to its offspring, suggesting that traits acquired during an organism's lifetime can be inherited. This idea contrasts with Darwin's theory of natural selection, which focuses on genetic variations that are naturally selected over generations, rather than traits gained through use or effort.
What are the movements of giraffes?
giraffes have sex all the time through the bum hole... with their necks. that is their movement..
