This nation asks for action , and action now. ... On his first full day in office he called Congress into special session. ... Roosevelt's New Deal would touch virtually every aspect of American ...
He got it right i just took that test
Answer:
changes in the environment could influence gene expression.
Explanation:
In humans, <u>skin color is defined by the abundance of "melanin" pigment</u>. The <u>darker is skin</u>, <u>high pigmentation</u> is there. Studies have proven that <u>high temperature</u> is the major reason for <u>high pigmentation/darker skin</u>. This is due to the reason that <u>high temperature</u> leads to the <u>increased expression</u> of the specific pigmentation related <u>genes</u> (e.g. MC1R gene). So, if a human is exposed to high temperature for a longer period, the action (expression) of the MC1R gene will be high as well. This will result in a tanned skin color. This is the reason that those <u>humans who live near to the equator (warmer climate) </u>have <u>darker skin</u> whereas those <u>humans that live close to poles (cold climate) </u>have <u>light-colored skin</u>.
