Outline of life forms

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A life form or lifeform is an entity that is living.[1][2]

Estimates on the number of Earth's current species range from 10 million to 14 million,[3] of which about 1.2 million have been documented and over 86 percent have not yet been described.[4] More recently, in May 2016, scientists reported that 1 trillion species are estimated to be on Earth currently with only one-thousandth of one percent described.[5]

More than 99% of all species, amounting to over five billion species,[6] that ever lived on Earth are estimated to be extinct.[7][8]


88 Nanoarchaeum equitans - This organism was discovered in 2002 and is considered a thermophile.



Organisms whose cells contain complex structures enclosed within membranes

See also[edit]


  1. ^ "life form". World English Dictionary. Dictionary.com. 2009. 
  2. ^ "life form". Online Oxford Dictionary of English. Oxford University Press. 2005. 
  3. ^ G. Miller; Scott Spoolman (2012). Environmental Science - Biodiversity Is a Crucial Part of the Earth's Natural Capital. Cengage Learning. p. 62. ISBN 1-133-70787-4. Retrieved 2014-12-27. 
  4. ^ Mora, C.; Tittensor, D.P.; Adl, S.; Simpson, A.G.; Worm, B. (23 August 2011). "How many species are there on Earth and in the ocean?". PLOS Biology. 9: e1001127. doi:10.1371/journal.pbio.1001127. PMC 3160336Freely accessible. PMID 21886479. 
  5. ^ Staff (2 May 2016). "Researchers find that Earth may be home to 1 trillion species". National Science Foundation. Retrieved 6 May 2016. 
  6. ^ Kunin, W.E.; Gaston, Kevin, eds. (31 December 1996). The Biology of Rarity: Causes and consequences of rare—common differences. ISBN 978-0412633805. Retrieved 26 May 2015. 
  7. ^ Stearns, Beverly Peterson; Stearns, S. C.; Stearns, Stephen C. (2000). Watching, from the Edge of Extinction. Yale University Press. p. preface x. ISBN 978-0-300-08469-6. Retrieved 30 May 2017. 
  8. ^ Novacek, Michael J. (8 November 2014). "Prehistory's Brilliant Future". New York Times. Retrieved 2014-12-25. 

External links[edit]