Read the following statements about the significance of mitosis. (i) It brings about the growth of multicellular organisms. (ii) It restores the nucleo-cytoplasmic ratio that cell growth disturbs. (iii) It repairs and replaces cells, such as the cells of the upper layer of the epidermis, of the lining of the gut, and blood cells. (iv) Divisions in the meristems, the apical and the lateral cambium, give continuous growth of plants throughout their life. (v) It increases the genetic variability in a population from one generation to the next. (vi) It halves the chromosome number, so that fertilisation can restore the diploid number in the next generation. How many of the statements above are correct?