Credit:
Diversity of the major life forms found in soil. A) bristletail (© F. Ashwood), B) springtail (© H. Conrad), C) nitrogen-fixing bacteria-containing nodules on clover root (© M. van der Heijden), D) predatory mite (© H. Conrad), E) isopod (© F. Ashwood), F) scots pine root colonized by ectomycorrhizal fungi (yellow) (© M. Anthony), G) earthworm (© G.Brändle), H) nematode (© A. Murray), I) corn root colonized by arbuscular mycorrhizal fungi (blue) (© F. Bender), J) springtail (© F. Ashwood), K) a common soil bacterium Bacillus (Creative Commons Attribution-Share license, photo by M. Das Murtey and P. Ramasamy), L) horned mite (© H. Conrad), M), pseudoscorpion (© F. Ashwood), N) phage infecting a soil bacterium (© T. de Carvalho), O) centipede (© F. Ashwood).