A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it. Acidic buffer solutions. An acidic buffer solution is simply one which has a pH less than 7. Acidic buffer solutions are commonly made from a weak acid and one of its salts-often a sodium salt. A common example would be a mixture of ethanoic acid and sodium ethanoate in solution. In this case, if the solution contained equal molar concentrations of both the acid and the salt, it would have a pH of 4.76.
They are haploid cells, because  they have half the number of chromosomes as an organism. During  fertilization the diploid number is restored. Sperm are single  cells. 3 people found this useful.
The best example of diploid cells is muscle cells while the best example for haploid is sperm. Haploid is the dominant cells in the reproduction process while the number of diploid cells is scarce. The number of diploid cells overall is greater than the number of haploid cells. In a human body, all the cells are diploids except for the ones which are haploids.