Answer:
The correct answer is: geography and UV radiation.
Explanation:
Skin variation occurred thanks to evolution, and was driven as a consequence of the geographical location of different populations of humans.
The humans that lived in hot and sunny places, closer to the equator, where much more exposed to the sun's ultraviolet radiation. In order to survive the amount of UV lights that they were exposed to, new humans in those regions were being born with a darker skin tone, which was rich in melanin (a brown pigment that protects us from the sun radiation).
Contrary to these humans that lived in the tropical areas, the humans that populated the areas that were closer to the poles, developed much lighter skin as a result of lower amounts of melanin in their skin. Since sun exposure in the poles is very limited, humans needed to receive as much as they could for the production of Vitamin D, and thus, their skins got lighter and less protected.
When someone moves to a place of higher education, financial issues are usually a big factor. Can they afford it? Is there ways help lower costs? Are they eligible for scholarships? Would they make enough to pay any student loans they may take? People also need to worry about if they have enough for a place to stay while in school, they also need to look at transportation. All of these factors are things that involve finance
Answer:
El pez que cultiva algas.
El cangrejo bailarín.
Explanation:
Since 1910, the urban population has grown by nearly 500 percent while the rural population has grown by 19 percent. ... The Census Bureau estimates that during the same 30-year period, the population of the 49 states grew by more than 82 million people, or 36 percent
Human eye color is an example of a phenotype that results from the interaction of multiple gene products.
<h3>
Is eye color determined by genetics?</h3>
- A person’s eye color results from pigmentation of a structure called the iris, which surrounds the tiny black hole which is located in the center of the eye (the pupil) and helps control the intensity of the light that enters the eye.
- The color range of the iris is from very light blue to dark brown. Brown is that the most frequent eye color worldwide.
- Eye color is decided by variations in a person’s genes.
- Most of the genes related to eye color are involved in the production, transport, or storage of a pigment called melanin.
- Eye color is directly associated with the amount of melanin in the front layers of the iris. People with brown eyes have an outsized amount of melanin in the iris, while people with blue eyes have much less of this pigment.
To learn more about eye color: brainly.com/question/1218649
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