Many organisms can reproduce sexually as well as asexually. Reptiles generally reproduce sexually, though some are capable of asexual reproduction. Haploid cells may then reproduce asexually by mitosis. Unicellular eukaryotes usually reproduce asexually by mitosis under favorable conditions. Red algae reproduce sexually as well as asexually. Fire corals can also reproduce asexually by fragmentation. Bacteria predominantly reproduce asexually through a process called binary fission. Furthermore, Ascomycota also reproduce asexually through budding. Some plants reproduce sexually, some asexually, and some via both means. Such discourses may in turn reproduce or modify social relationships. "Spirogyra" can reproduce both sexually and asexually. "Rhizopus stolonifer" can reproduce asexually and sexually. Instead of seeds, mushrooms reproduce asexually through spores. Lamprey are only able to reproduce once. Ciliates reproduce asexually, by various kinds of fission.