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.
The tree that giraffes eat from is commonly known as the acacia tree. Giraffes use their long necks to reach the leaves and twigs high up in the tree canopy, which are a major part of their diet.
Examples of environmental changes adaptations include changes in fur color to blend into snowy landscapes, development of long necks in giraffes to reach high leaves, and the ability of certain fish species to survive in oxygen-depleted waters by using alternate respiration methods.
The animal that can't swim is the giraffe. Giraffes have long legs and a heavy body, which makes it difficult for them to stay afloat in water. Additionally, their long necks make it hard for them to keep their heads above water. This combination of factors makes it nearly impossible for giraffes to swim effectively.
The theory of use and disuse of Jean-Baptiste Lamarck, advocated the idea that animals acquired characteristics after using certain physical traits constantly. For example, he believed that the reason why the necks of giraffes were long was because they stretched to reach leaves on high trees. By the same logic, the lack of a human tail could be explained by the fact that humans did not use it. This idea is not correct, however, it advanced evolutionary theory!
The animal with the longest neck in the world is the giraffe. Their long necks help them to reach leaves high up in trees for food and also play a role in fighting other giraffes.
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.
Giraffes have long necks because their ancestors stretched their necks reaching for food, and this trait was passed on their offspring.
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.
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.
One very famous example is that giraffes stretched their necks all their lives to reach leaves that are very high on trees, and when they produced offspring, they passed the long necks down to them.
Lamarck proposed for inheritance of acquired traits. Example, giraffes stretched their neck to feed on shoots on tall trees. This lead to elongation of the necks, and they pass this traits to their offspring. This goes on and on, and eventually giraffes end up with long necks.
Giraffes use their necks in the same way we use ours. They are just longer.
Jean-Baptiste Lamarck (1744-1829) theorized that giraffes are an ideal model to prove evolution. He theorized giraffe necks grew longer as their ancestors constantly reached into treetops for food, which was out of reach of other animals.
Yes, they do.
Giraffes evovled with long necks so they can reach the tree and eat the leaves.
no
on their necks