6c2930289c Publ. Cell. Microorganisms were neither proven, observed, nor accurately described until the 17th century. 361 (1470): 9691006. Bibcode:1992PNAS.89.6045G. "Meet Luca, the Ancestor of All Living Things". In Kimura, Sakura; Shimizu, Sora. That spike in nickel allowed methanogens to take off. Some micro-animals reproduce both sexually and asexually and may reach new habitats by producing eggs which can survive harsh environments that would kill the adult animal.
^ Dose, K; Bieger-Dose, A.; Dillmann, R.; Gill, M.; Kerz, O.; Klein, A.; Meinert, H.; Nawroth, T.; Risi, S.; Stridde, C. "Oldest fossil found: Meet your microbial mom". The yeasts (Saccharomyces cerevisiae) and fission yeast (Schizosaccharomyces pombe) are important model organisms in science, since they are simple eukaryotes that can be grown rapidly in large numbers and are easily manipulated. They are particularly valuable in genetics, genomics and proteomics. Microorganisms can be harnessed for uses such as creating steroids and treating skin diseases. The Genesis of Germs: The Origin of Diseases and the Coming Plagues. Biol. He also found that new microorganisms could only settle in a broth if the broth was exposed to air. v t e Branches of life science and biology Anatomy Astrobiology Biochemistry Biogeography Biohistory Biomechanics Biophysics Bioinformatics Biostatistics Botany Cell biology Cellular microbiology Chemical biology Chronobiology Computational biology Conservation biology Cytogenetics Developmental biology Ecology Embryology Epidemiology Epigenetics Evolutionary biology Freshwater biology Geobiology Genetics Genomics Histology Human biology Immunology Marine biology Mathematical biology Microbiology Molecular biology Mycology Neontology Neuroscience Nutrition Origin of life Paleontology Parasitology Pathology Pharmacology Phylogenetics Physiology Quantum biology Sociobiology Structural biology Systematics Systems biology Taxonomy Teratology Toxicology Virology Virophysics Zoology . ^ "Dairy Microbiology".