What is an example of natural selection in humans?

One example of recent natural selection in humans involves the ability to tolerate the sugar, lactose, in milk. In most parts of the world, adults are unable to drink milk because their body switches off the intestinal production of lactase, an enzyme that digests the sugar in the milk, after weaning.Jul 21, 2021

What is natural selection in humans?

Natural selection occurs when some of those traits help some individuals survive and reproduce more than others. That causes their genes to become more common in the population over time, and it's the way species evolve to adapt to changes in their environment.

Does natural selection happen to humans?

"Without a doubt, natural selection occurs in modern humans," agrees Jacob Moorad, an evolutionary biologist at Duke University in Durham, North Carolina, who was not involved in the study.

What are some examples of natural selection?

• Deer Mouse.
• Warrior Ants. …
• Peacocks. …
• Galapagos Finches. …
• Pesticide-resistant Insects. …
• Rat Snake. All rat snakes have similar diets, are excellent climbers and kill by constriction. …
• Peppered Moth. Many times a species is forced to make changes as a direct result of human progress. …
• 10 Examples of Natural Selection. « previous. …

Which is the best example of natural selection?

Tree frogs are the best examples of natural selection.

• Natural selection is a natural process in which organisms that are more adapted to their environment successfully reproduce more than those that are not.
• Snakes and birds, for example, have been known to devour tree frogs.

How are giraffes an example of natural selection?

In terms of the giraffe example, Darwin's theory of evolution through natural selection would suggest that a giraffe was born with a longer neck by random chance. Because this individual had a longer neck, it was able to reach food sources that other animals couldn't.

How are peacocks an example of natural selection?

The peacocks with the showier feathers are able to attract mates, so they are the ones that have offspring, and pass on the fancy-feather genes to the next generation.

Are lizards natural selection?

For more than a century, scientists have understood that natural selection have profound effects on how an animal looks — Anolis lizards that spend more time on the ground, for example, might need longer legs for running, while species that remain in the trees usually have shorter legs better suited for climbing.

What animal is an example of natural selection?

A classic example of natural selection at work is the origin of giraffes' long necks. The ancestors of modern giraffes were animals similar to deer or antelope, with necks of ordinary length.

What are the three types of natural selection?

There are three types of natural selection that can occur. Stabilizing selection, directional selection or disruptive selection.