NEET BIOLOGY

Detailed explanation-1: -It is typically a secondary sex characteristic of human males. Men typically start developing facial hair in the later stages of puberty or adolescence, around fifteen years of age, and most do not finish developing a full adult beard until around eighteen or later.

Detailed explanation-2: -The health benefits of beards Beards can: Protect skin from sun damage. Beards can help protect the skin from harmful UV rays, though the degree of protection may depend on hair density and thickness. “You’re going to have some protection because hair is a reflective medium, ” says Dr.

Detailed explanation-3: -Facial hair growth is largely propelled by testosterone, a hormone. Testosterone levels can vary. For men between 19 and 38, the normal range is 264 to 916 nanograms per deciliter (ng/dL). This represents about the 3rd through 98th percentile for testosterone.

Detailed explanation-4: -A new study shows that facial hair says a lot about a man and that attractiveness peaks at the “heavy stubble” phase. Researchers photographed 10 men at four stages of beard growth: clean shaven, 5-day “light” stubble, 10-day “heavy” stubble (shown), and fully bearded.