In the film, Dr. Jablonski explains that melanin, located in the top layer of human skin, absoros UV radiation, protecting cells from the damaging effects of UV. Genetics determines the type of
melanin (i. e., brown/black eumelanin or red/brown pheomelanin) and the amount of melanin)
Please help ...
present in an individual's cells.
Based on this information, write a hypothesis for where in the world you would expect to find
human populations with darker or lighter skin pigmentation (i. e., different amounts of melanin).

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.