Related by context. Frequent words. (Click for all words.) 60 microorganisms 60 Penicillium 59 Microorganisms 59 organisms 59 Cyanobacteria 59 methanogens 58 clathrates 58 bacteria fungi 58 Archaea 58 microbes 58 extremophiles 57 micro organisms 57 slime molds 57 fungi 57 Bacillus subtilis 56 archaea 56 unicellular 56 microorganism 56 micro organism 56 abiotic 55 nitrogen fixing 55 humid climates 55 vertebrate animals 55 Geobacter 55 multicellular organisms 55 microbial ecology 54 single celled 54 Dust mites 54 temperate zones 54 alga 54 anaerobic bacteria 53 mycorrhizal fungi 53 Photosynthesis 53 photochemistry 53 thermochemical 53 flatworms 53 microscopic organisms 53 rotifers 53 zeolites 52 mucilage 52 amoebae 52 Microbial 52 gut microbes 52 nematode worms 52 naturally occurring 52 microbe 52 arid climates 52 Campylobacter jejuni 52 prokaryotes 52 larval stages 52 organism 52 phages 52 amoebas 51 bioaccumulation 51 bioassays 51 epiphytes 51 naturally occurring substances 51 single celled organisms 51 nanobubbles 51 humans 51 superconducting materials 51 nitrogen fixation 51 bacteria 51 Nematodes 51 pseudomonas 51 diatoms 51 mycobacteria 51 cold climates 50 Toxoplasma gondii 50 mycobacterial 50 diatom 50 protozoan 50 pathogens 50 ionic liquids 50 biological molecules 50 eukaryotic cells 50 lignocellulose 50 nanotechnological 50 terpenes 50 temperate climates 50 photosynthesize 50 organic acids 50 single celled organism 50 cyanobacteria 50 inorganic compounds 50 ribozymes 50 pathogenic microorganisms 50 nanobacteria 50 marine invertebrates 50 secondary metabolites 50 aromatic compounds 50 microscopic algae 50 bacterial colonies 50 metagenomic 50 fungal spores 50 bioactive compounds 50 microscopic worms 50 fungal pathogen 50 Scientists theorize 50 amphipods 50 Subtropical