<span>Melanin helps protect the skin against effects of the sun such as skin cancers and premature aging. In African American skin, melanin provides a sun protection factor (SPF) equivalent to 13.4 compared to 3.4 in white skin and thus the former have lower incidences of skin disorders associated with exposure to the sun.</span>
It is based on shared characteristics
A nucleus cell contains chromosomes among other things.
True! because without gravity the spacecraft wouldn't go where there wanted it, in the time that they wanted it
C) Help with plant defense.
Many species are known to eat many plants, including flowers. To avoid being eaten, thorns in a rose bush help defend itself.
