What kind of selection is giraffe necks?

natural selection
The giraffe’s long neck is a perfect adaptation to the animal’s natural habitat. Clearly the giraffe evolved this uncommon and helpful trait in order to reach those nourishing leaves. That’s how natural selection works.

Why do giraffes have long necks natural selection?

It appears obvious: the giraffe’s neck, which can grow to as much as two metres in length, has been selected because it gives its owner exclusive access to the topmost leaves of the trees, and no other animal can reach them. This, then, is an adaptation designed to avoid competition for food with other animals.

How did long necks in giraffes evolve?

In short, giraffes’ long necks are the result of generation upon generation of repeated stretching and inheritance. Instead he argued that the giraffe’s neck results from repeated “natural selection”. Long-necked giraffes were more likely to survive hard times than their short-necked rivals.

How is natural selection in the evolution of long necks in giraffes best explained quizlet?

How have giraffes evolved by Natural Selection to have long necks? Giraffes faced the struggle for existence because short-necked giraffes would not be able to reach vegetation in the higher branches of trees whereas long-necked giraffes would be able to get food and thus survive.

What feature of the environment enabled the development of long neck of the giraffe according to Lamarck’s theory?

According to Lamarck, the giraffe got its long neck because its ancestors stretched theirs to eat leaves that were just out of reach. This stretching of the neck was passed on to their offspring, over generations, until it reached its current length.

What is the process of evolution by selection?

Natural selection is the process through which populations of living organisms adapt and change. Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.

When did giraffes evolve?

approximately 50 million years ago
The evolutionary history of the giraffe brings us back to approximately 50 million years ago. An animal similar to antelopes evolved into two species that are extant today. Many of these animals roamed across Eurasia and Africa until they went extinct or evolved into animals we see today.

What are the 3 conditions for natural selection quizlet?

Natural selection is a passive process that works on the traits or DNA that already exist in a population. The three conditions that must be met in order for natural selection to occur and result in evolutionary change are traits, inherited, and selection pressure.