Skin color is indeed related to UV radiation. In the equator, there is higher UV radiation due to the tropical climate in the equator. The equator is at 0 to 20 latitude therefore at this location, darker skin are found because darker skin helps protect from sun damage. From the temperate regions at 60 to 80 latitude, lighter skin is found as UV rays are not as potent compared to the equator.
<em>The correct answer is dark skin at 0-20 and light skin at 60-80.</em>
A pipette is a thin/narrow glass tube that is used to transfer liquids. A spatula is a steel utensils used to scrape, transfer, and apply powders and pastes. A test tube is a glass or plastic tube that is used for holding, mixing, and heating liquid chemicals. A graduated cylinder is a skinny long cylinder used for measuring volumes. So the instrument that would best suitable for holding a liquid while heating it over a flame is a test tube. so the answer is C.
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