The answer is; the melanin in darkly pigmented skin protects DNA from UV radiation, and UV radiation can cause skin cancer
In Africa, due to its equatorial latitude location, receives direct sunlight at more or less 90 degrees most of the year. These highly concentrated rays increase the UV radiation exposure that can cause damage to cell DNA. Selection pressure, therefore, favored individuals with high melanin concentrations that protect against UV. Therefore population evolved towards high melanin densities in the skin.
Four new haploid cells are formed once the sister chromatids within the two daughter cells separate, forming four new haploid gametes.
Answer:
A: Results In Hypertrophy
Explanation:
Testosterone is responsible for increased muscle mass. Leaner body mass helps control weight and increases energy. For men with low testosterone, studies show that treatment can decrease fat mass and increase muscle size and strength. Some men reported a change in lean body mass but no increase in strength.
Answer:
Digestion, distribution of nutrients throughout the body, and it can serve as a hydrostatic skeleton.
