Outline of life forms

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]

Archaea

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

Bacteria

Eukaryote

Organisms whose cells contain complex structures enclosed within membranes

See also

References

  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. PMC 3160336Freely accessible. PMID 21886479. doi:10.1371/journal.pbio.1001127.
  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.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.