Which statement best explains why the overall charge on an atom is zero? the positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud. the positive charge of the protons in the nucleus equals the negative charge in the electron cloud. the negative charge of the neutrons in the nucleus equals the positive charge in the electron cloud. the negative charge of the protons in the nucleus equals the positive charge in the electron clou

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?