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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.
What else can I help you with?
Who believed the early giraffes had short necks?
Charles Darwin
What is the significance of Darwin's observation about the difference in Finch populations?
They differed depending on what island they were on.
Darwin observed that the small brown birds on the Galapagos Islands differed in the shape of their?
beaks
How did Jean Baptiste Lamarck influence Charles Darwin?
Jean Baptiste Lamarck's idea of the inheritance of acquired characteristics, although mostly rejected today, was one of the first systematic explanations for evolution, influencing Darwin's thinking. While Darwin's theory of natural selection differed significantly from Lamarck's, Lamarck's work helped pave the way for questioning and exploring evolutionary mechanisms that ultimately led to Darwin's own theory of evolution by natural selection.
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.
In what ways did Lamarck and Darwin agree?
Lamarck and Darwin both agreed on the idea that organisms change over time and that these changes can lead to the evolution of new species. They recognized the influence of the environment on the traits of organisms, suggesting that adaptations can arise in response to environmental pressures. Additionally, both scientists acknowledged the importance of variation within species, although they differed significantly in their explanations of how these changes occur.
What was one of the adaptations that Darwin noted?
He saw that the animals differed slightly among the islands. He saw lizards that differed from the mainland of Africa. They had sharper and longer claws, perfect for staying on the rocks on the shores.
What did Darwin study on the Galapagos's islands?
Certain species, and how they differed from one island to another; in this case, specifically, finches and tortoises.
What are some similarities in Lamarck and Darwin. Theory?
Both Lamarck and Darwin contributed significantly to the understanding of evolution, emphasizing the adaptation of species to their environments. They recognized that organisms change over time, although their mechanisms differed: Lamarck proposed the inheritance of acquired characteristics, while Darwin introduced natural selection as the primary driver of evolution. Both theories acknowledge the importance of environmental influences on species, highlighting a shared interest in how life evolves. Ultimately, while their explanations diverged, they both sought to explain the diversity of life on Earth.
Why did Darwin believe that only a small number of offspring survive?
It wasn't exactly that. Darwin believed that species evolved through natural selection. Meaning the individual that's best suited for the environment survives. So for example giraffes. As the food started getting harder and harder to reach only giraffes with longer necks would survive. Hence giraffes have freakishly long necks now
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.
Modern scientific explanations of evolution?
That no species is stable, and that all species become extinct in time. That includes us.
