What is the difference between diploid and haploid cells?

diploid cells contain two chromosomes while haploid cells contain one.
diploid cells are usually gametes.
diploid cells have paired chromosomes while haploid cells have single chromosomes.
there is no difference.

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

Arepair man charged $93.06 the price included 2 hours of labor and 40 service charge how much does the repairmen charge per hour for labor?

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?