Alternation between a multicellular diploid and a multicellular haploid generation is never encountered in animals. Tetraploid forms are larger and coarser than diploid forms. This results in diploid and haploid nuclei being found in the germ sporangium. Nearly all land plants have alternating diploid and haploid generations. They have life cycles with alternating haploid and diploid phases. Houseflies have a small number of chromosomes, haploid 6 or diploid 12. However, since plants have an alternation of diploid and haploid generations some differences exist. Gametes are produced by meiosis of a diploid germ line cell. The life cycle of coccolithophores is characterized by an alternation of diploid and haploid phases. This is actually a species complex that includes distinct diploid and tetraploid races. The zygote divides by mitotic division and grows into a sporophyte that is diploid. Polish botanist Eduard Strasburger coined the terms "haploid" and "diploid" in 1905. Meiosis is used for a special cell reproduction process of diploid organisms. Maize is a diploid with 20 chromosomes (n=10). Polyploidy from the diploid (14 chromosomes) to the tetradecaploid (98 chromosomes) is exhibited.