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because their ancestors stretched their necks reaching for food
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How would Lamarck explain the development of giraffes with long necks?
Lamarck would explain the development of giraffes with long necks as a result of the giraffes stretching their necks to reach higher leaves, and passing on this acquired trait to their offspring. This is known as the theory of inheritance of acquired characteristics.
A supporter of the evolutionary theory set forth by Lamarck would probably theorize that the giraffe evolved a long neck due to?
A supporter of Lamarck's evolutionary theory would theorize that giraffes evolved long necks because their ancestors stretched their necks to reach higher leaves in trees. This acquired trait would then be passed on to their offspring, leading to progressively longer necks over generations. Lamarck's idea emphasized the role of use and disuse of traits in adaptation, suggesting that the giraffes' efforts to reach food influenced their physical evolution.
Darwin and Lamarck had different ideas about why all giraffes now have long necks why?
Lamarck would have said that the ancestors of modern-day giraffes had short necks but stretched their necks as they tried to reach leaves in trees; so, their descendants were born with longer necks. Darwin would have said that in a population of ancestral giraffes, some had slightly longer necks than others; the long-necked giraffes were better able to feed on tree leaves and as a result produced more offspring. Over time, the proportion of longnecked giraffes in the population increased.
How would vestigial traits be explained if evolution occurred via inheritance of acquired characters as proposed by Lamarck?
as a change in an individual's phenotype in response to an environmental challenge
Why did Darwin think giraffes are a good example of natural selections?
Actually, it was Lamarck who earlier introduced the giraffe as an example for evolution - Lamarckian evolution, to be sure. Lamarck proposed that there was some mechanism by which the short-necked ancestors of giraffes could acquire a change such that their offspring would have necks better suited to their needs. Darwin applied natural selection to the same example mainly because it had already been discussed in such detail.
If Lamark and Darwin had debated why giraffes have such long necks how would their explanations differed?
Lamarck would have said that the ancestors of modern-day giraffes had short necks but stretched their necks as they tried to reach leaves in trees; so, their descendants were born with longer necks. Darwin would have said that in a population of ancestral giraffes, some had slightly longer necks than others; the long-necked giraffes were better able to feed on tree leaves and as a result produced more offspring. Over time, the proportion of longnecked giraffes in the population increased.
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.
How might Lamarck have explained an elephant's long trunk?
Lamarck might have explained an elephant's long trunk through his theory of inheritance of acquired characteristics. He would suggest that ancestral elephants stretched their trunks to reach food and water, and this effort led to gradual elongation over generations. Thus, the traits acquired during an individual’s lifetime were passed down to their offspring, resulting in the long trunk observed in modern elephants.
Who are Darwin and lamark?
Charles Darwin was a naturalist and the author of On the Origin of Species. Darwin believed that species evolved though random mutation, with mutations that caused a beneficial change being more successful than those that caused maladaptive or no change. He called this process "natural selection."Jean-Baptiste Lamarck was a naturalist who believed that creatures could change during their own lifetime, acquiring characteristics in response to changes in the environment, which they could then pass on to their offspring.For example, we know that giraffes have long necks. Lamarck would say that giraffes with shorter necks would stretch high to reach leaves in the tops of trees. This would stretch their necks. Their offspring would then be born with longer necks. Darwin said that short-necked giraffes would have competition with other grazing animals, so giraffes with even a slightly longer neck would be able to eat leaves that antelope and other grazers couldn't reach. These giraffes would be more likely to be well fed and reproduce, and pass their longer necks along to their offspring.We now know that, with some limitations, Darwins theory is corect.
Why is the theory of acquired characteristics to the giraffe?
The theory of acquired characteristics, proposed by Jean-Baptiste Lamarck, suggests that organisms can pass on traits acquired during their lifetime to their offspring. In the case of the giraffe, Lamarck theorized that ancestral giraffes stretched their necks to reach higher leaves, and this elongated trait would then be inherited by their descendants. However, this theory has been largely discredited in favor of Darwinian evolution, which explains giraffe neck length as a result of natural selection, where individuals with longer necks had better access to food and thus higher survival rates.
How did Lamarck think species evolve?
Lamarck's theory is that an organism can pass traits to their offspring that they have acquired in their lifetime. One example commonly used is that he felt giraffes acquired long necks because of generations of them stretching and trying to reach higher leaves on the tree. He thought that these stretched muscles would be passed down to their offspring. This has been proven wrong because this is not how evolution takes place. If you would cut off the tails of two mice and then breed them their offspring would not have short tails.
How would Lamarck have explained the large eyes of an owl?
Darwin would have said that a few owls were born with bigger eyes. The owls with the big eyes would survive better and have more offspring so the owls with small eyes were less common untill there were only big eyed owls. This is called natural selection.
