Question

Due today. Will you help me i have a C and need to make it a B and will mark brainiliest

Answer 1

In the past few thousand years, many human populations have evolved adaptations to their local environment. For example, human populations in Siberia and the high artic have adaptations that allow them to withstand the low temperatures of the region. These include a prolonged period until the onset of frostbite, and a higher basal metabolism (allowing for more metabolic heat production). Another example is individuals of a particular population in Southeast Asia have adaptations that allow them to dive to 17 m deep and stay underwater for 15 minutes. This ability is the result of unusually large spleens which act as oxygen reserves in these individuals. Each of these adaptations I have described has occurred only within a few thousand years, which is a very short time frame within the context of evolution. The rapid evolution of these traits beneficial for local environments is evidence that human evolution is an ongoing process.

I do not think that any new beneficial adaptation could evolve in the human population. Modern medicine and society has created a situation where there is no longer differential reproductive success between individuals. What historically may have been a beneficial trait, no longer plays a major role in determining the relative fitness of an individual. For this reason, natural selection does not act on new traits within the human population and these traits to not rise in frequency in the population overtime. It is possible that new beneficial traits are introduced into the population by mutation, but these traits certainly won’t reach fixation in the population due to lack of natural selection on these traits. The frequency of these traits will be determined primarily by random changes in the frequency of these traits over time (genetic drift).

Answer 2

Answer:

The video says that Tibetan people from birth have higher oxygen saturation due to evolution.

The video says that people in Siberia and the high arctic have adapted to survive extreme cold.

I think that one evolution that could be beneficial to humans is the ability to have more tougher skin because our skin doesn't have too many layers.

Explanation:

Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day! Hope you get an A in that class!!!!