dakshshberry
14.07.2019 •
Biology
Which is a major contributor to the success of our species? a. human adaptability b. high fecundity c. skin tone variation d. body variation?
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Ответ:
Answer is (a) human adaptability.
Rationale for rejecting b,c,d options:
Humans do not have a high fecundity, they can give birth to 1-3 offspring on an average.
The skin tone variation is an adaptation that is based on the geography. The sunlight intensity affects it. It is a part of the ability of the humans to efficiently adapt to their surroundings.
The body variation in the form of physical features is also the result of the ability of the humans to adapt to their surroundings.
Ответ:
Melanin
Explanation:
Melanin is the protective component of skin that defends us against UV light.
UV light poses big risks to our health, as it can damage DNA. DNA damage can lead to cancers like skin cancer.
Melanin is a pigment in the skin that protects us from UV light. This pigment blocks UV radiation from entering our skin and damaging our DNA.
So, the correct answer is melanin.