The natural history of British insects. v.1.
London :Printed for the author, and for F. and C. Rivington,1792-1813.
biodiversitylibrary.org/page/30029496
Description: English: Two cells of complementary mating types pair to exchange nuclei during sexual conjugation. Date: 8 March 2016. Source: Own work. Author: Jmf368w.
Description: English: Tetrahymena conjugation When nutrients are scarce, two individuals (A) pair with each other and begin sexual reproduction (conjugation). (B) The diploid micronucleus in each individual undergoes meiosis to form four haploid nuclei, and three of these are degraded. (C) The remaining haploid nucleus divides mitotically to form two pronuclei in each cell. (D) One of the two pronuclei in each cell is exchanged with the mating partner, and fusion leads to he formation of the diploid zygotic nucleus. (E) The zygotic nucleus divides twice mitotically to form four nuclei. (F) Two nuclei become micronuclei, and the other two differentiate to become macronuclei; the original parental macronucleus is degraded. (G) Cell division occurs and the nuclei are distributed to the daughter cells so that each progeny receives one micronucleus and one macronucleus. Date: 16 April 2014, 11:58:27. Source: Own work. Author: Chaya5260.
Description: 160x, Dunkelfeld Kernfärbung mit Ethylgrün (Lebendfärbung). Das "J" ist der Zellkern, der bei Protozoen nicht immer die Form einer Kugel hat. Date: 5 November 2012, 11:01. Source: Glockentierchen. Author: Picturepest.
Description: 160x, Dunkelfeld Kernfärbung mit Ethylgrün (Lebendfärbung). Das "J" ist der Zellkern, der bei Protozoen nicht immer die Form einer Kugel hat. Date: 5 November 2012, 11:00. Source: Glockentierchen. Author: Picturepest.
Description: 160x, Dunkelfeld Kernfärbung mit Ethylgrün (Lebendfärbung). Das "J" ist der Zellkern, der bei Protozoen nicht immer die Form einer Kugel hat. Date: 5 November 2012, 11:02. Source: Glockentierchen. Author: Picturepest.
Description: This file was uploaded with Commonist. Deutsch: Bewohner aus dem Belebtschlamm eines Klärwerks. Ciliophora, Sessilida English: Inhabitants from activated sludge from a sewage treatment plant. Date: 21 October 2011, 16:04:52. Source: http://www.mikro-foto.de. Author: Frank Fox. Permission(Reusing this file): : This work is free and may be used by anyone for any purpose. If you wish to use this content, you do not need to request permission as long as you follow any licensing requirements mentioned on this page. The Wikimedia Foundation has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been reviewed by an Volunteer Response Team (VRT) member and stored in our permission archive. The correspondence is available to trusted volunteers as ticket #2012071310003455. If you have questions about the archived correspondence, please use the OTRS noticeboard. Ticket link: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2012071310003455.
Description: This file was uploaded with Commonist. Deutsch: Bewohner aus dem Belebtschlamm eines Klärwerks. Ciliophora, Sessilida English: Inhabitants from activated sludge from a sewage treatment plant. Date: 21 October 2011, 15:17:28. Source: http://www.mikro-foto.de. Author: Frank Fox. Permission(Reusing this file): : This work is free and may be used by anyone for any purpose. If you wish to use this content, you do not need to request permission as long as you follow any licensing requirements mentioned on this page. The Wikimedia Foundation has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been reviewed by an Volunteer Response Team (VRT) member and stored in our permission archive. The correspondence is available to trusted volunteers as ticket #2012071310003455. If you have questions about the archived correspondence, please use the OTRS noticeboard. Ticket link: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2012071310003455.
Description: English: Ichthyophthirius multifiliis (ich) a common single-celled parasite of wild fish that finds its way into hatcheries through their water supplies (often streams and rivers that harbor wild fish populations). Date: 6 September 2013. Source: Flickr. Author: Andy Goodwin/USFWS.