Answer:
If your teacher names you president of the class you have bee:an excellent student,and a leader.
Explanation:
Melanin provides pigmentation to the skin and it also provides UV ray protection (which is its role in the epidermis).
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Answer:
Limiting variables include a low supply of food and lack of room. Limiting variables may reduce birth rates, increase death rates, or contribute to emigration. Limiting factors determine a population's carrying capacity. Recall that the population grows exponentially when there are no limiting factors.
Explanation:
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normally, the average adult human body (with a weight between 150 and 180lbs) holds 4.7 to 5.5 liters of blood.