Answer: Someone who lives along the equator will have a greater number of:
B. Active melanocytes.
Step-by-step explanation:
1. Melanocytes: Melanocytes are specialized cells in the skin that produce the pigment melanin. Melanin helps protect the skin from harmful UV radiation from the sun.
2. Sun exposure: The equator receives more direct sunlight compared to the poles. This increased exposure to sunlight leads to a higher intensity of UV radiation.
3. Melanin production: In response to increased UV radiation, the body produces more melanin to protect the skin from damage. Melanin absorbs and disperses UV radiation, reducing the risk of sunburn and skin cancer.
4. Greater number of active melanocytes: Living along the equator means experiencing more intense sunlight year-round. As a result, the body will have a higher number of active melanocytes to produce more melanin and provide enhanced protection against UV radiation.
Options A, C, and D are incorrect:
A. Follicles that are large only on the chin: The size of follicles on the chin is not influenced by living along the equator. This statement is unrelated to sun exposure or geographic location.
C. Active oil glands: While the activity of oil glands can be influenced by various factors, such as hormones and genetics, it is not specifically related to living along the equator. The statement does not accurately reflect the impact of geographic location on oil gland activity.
D. Comedones: Comedones, commonly known as blackheads or whiteheads, are caused by the blockage of hair follicles by excess oil, dead skin cells, and bacteria. The number of comedones is not directly affected by living along the equator.
In summary, someone who lives along the equator will have a greater number of active melanocytes compared to someone who lives at the North Pole due to the increased intensity of sunlight and the need for enhanced protection against UV radiation.