Visualize an image that could represent the concept of natural selection and skin color evolution. Show a spectrum of human skin tones ranging from very fair to dark, strategically portraying the different locations of Earth from the equator to the poles. Depict rays of UV light penetrating the atmosphere to show its impact on humans. In a subtle corner, portray the narrative of the peppered moth evolution, showing a group of moths in various shades of black to white, situated on a backdrop of the industrial revolution environment.

Color and Natural Selection Quick check

Which component of skin protects against uv light?
    -melanin.

which factor correlated with human populations losing skin pigmentation?
     -Moving away from the equator.

which factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection?
        -the impact of UV radiation on folate and vitamin D levels in human populations.

which situation demonstrates causation?
     - A change in one variable produces a change in the other

which factor could have allowed the population of black peppered moths to increase in the late 1800s?
         -less predation

9 answers

%100!

all r correct🤭🤭🤭🤓

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To answer these questions, I utilized a combination of general knowledge in the field of biology and an understanding of natural selection. Let me explain how I arrived at the answers:

1. Which component of skin protects against UV light?
- I know that melanin is the pigment responsible for skin, hair, and eye color in humans. Additionally, melanin provides protection against UV radiation from the sun.

2. Which factor correlated with human populations losing skin pigmentation?
- I know that human populations living closer to the equator have a higher concentration of melanin in their skin to protect against the intense UV radiation. As populations moved away from the equator, there was less need for melanin, leading to a decrease in skin pigmentation.

3. Which factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection?
- I know that the impact of UV radiation on folate and vitamin D levels is important for human populations. Folate is essential for reproductive health, and vitamin D is crucial for calcium absorption. With less UV radiation exposure, humans would need less melanin for protection, leading to lighter skin. This demonstrates how natural selection can directly cause a change in skin pigmentation.

4. Which situation demonstrates causation?
- I know that causation refers to when a change in one variable results in a change in another variable. In the context of the question, it could imply that one factor directly influences another. Therefore, the situation that best demonstrates causation would be when a change in one variable produces a change in the other.

5. Which factor could have allowed the population of black peppered moths to increase in the late 1800s?
- I know that black peppered moths are known for their ability to camouflage on dark tree barks, which gives them a survival advantage against predators. In the late 1800s, during the industrial revolution, pollution caused many trees to darken. This provided a favorable environment for black peppered moths, as they were able to blend in better and experience less predation.

In conclusion, by combining knowledge of biology and natural selection, I was able to explain how to arrive at the correct answers to the given questions.