Does darker skin reflect more light?

Darker skin absorbs more light and reflects less light, so it has lower reflectance than lighter skin, which absorbs less light and reflects more. At the equator (0 degrees latitude), the percent of light reflected by the skin is lowest.

How does the process of natural selection influence skin color?

As people moved to areas farther from the equator with lower UV levels, natural selection favored lighter skin which allowed UV rays to penetrate and produce essential vitamin D. The darker skin of peoples who lived closer to the equator was important in preventing folate deficiency.

What is selective pressure for lighter skin color?

6. Indigenous populations in low-UV environments tend to have lighter skin tones. One hypothesis is that, in low-UV environments, the selective pressure for dark skin is low. Instead, there is selective pressure for lighter skin, which absorbs more UV radiation, since UV is needed for vitamin D production.

Does dark skin reflect less light?

Dark skin absorbs most light before it reaches the hereditary material. Africans appear dark, while we appear light. But in the area of ultraviolet radiation, the opposite is true. We have recently discovered that UV, which makes vitamin D, is spread and reflected less from light than from dark skin!

What colors make white skin tone?

To create realistic flesh tones, start by mixing an equal part of red, yellow, blue, and white paint together. Then, if you want to make light skin tones, add in more white and yellow to lighten the color. If you want to create mid-range skin tones, try adding equal parts burnt umber and raw sienna to darken the shade.

In what way does natural selection depend on the specific?

In what way does natural selection depend on the specific environment in which an organism lives? when the environment changes, traits that were beneficial to an organism may become harmful and vice versa.

What are the advantages and disadvantages of light skin color?

For lighter skin color? Darker skin gives protection from UV damage, so in places with intense UV light, it is advantageous. However, at places with less UV light, light skin is advantageous (places at high altitudes or far from the equator). This is because too much radiations causes skin cancer, but too little leads to a vitamin D deficiency

Is it better to have light or dark skin?

Darker skin gives protection from UV damage, so in places with intense UV light, it is advantageous. However, at places with less UV light, light skin is advantageous (places at high altitudes or far from the equator). This is because too much radiations causes skin cancer, but too little leads to a vitamin D deficiency

Why does nature have selected people with darker skin?

Nature has selected for people with darker skin in tropical latitudes, especially in nonforested regions, where ultraviolet radiation from the sun is usually the most intense. Melanin acts as a protective biological shield against ultraviolet radiation.

Why is skin color different in different countries?

Some of the variation in human skin coloration (Sub-Saharan African, Indian, Southern European, and Northern European) Skin color is due primarily to the presence of a pigment called melanin, which is controlled by at least 6 genes. Both light and dark complexioned people have melanin.