googletag.pubads().setTargeting('cdo_alc_pr', pl_p.split(",")); All rights reserved. { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, googletag.pubads().collapseEmptyDivs(false); { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_MidArticle' }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_HDX' }}, { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, A phylum or grouping of phyla which comprises the single-celled microscopic animals, which include amoebas, flagellates, ciliates, sporozoans, and many other forms. if(!isPlusPopupShown()) {code: 'ad_rightslot', pubstack: { adUnitName: 'cdo_rightslot', adUnitPath: '/2863368/rightslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, { bidder: 'onemobile', params: { dcn: '8a9690ab01717182962182bb50ce0007', pos: 'cdo_topslot_mobile_flex' }}, Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. type: "cookie", { bidder: 'ix', params: { siteId: '555365', size: [120, 600] }}, { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}]; The word in the example sentence does not match the entry word. dfpSlots['topslot_b'] = googletag.defineSlot('/2863368/topslot', [[728, 90]], 'ad_topslot_b').defineSizeMapping(mapping_topslot_b).setTargeting('sri', '0').setTargeting('vp', 'top').setTargeting('hp', 'center').addService(googletag.pubads()); 'cap': true bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776130', position: 'btf' }}, iasLog("criterion : cdo_l = en"); { bidder: 'ix', params: { siteId: '195465', size: [300, 250] }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_btmslot' }}, {code: 'ad_topslot_a', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, {code: 'ad_btmslot_a', pubstack: { adUnitName: 'cdo_btmslot', adUnitPath: '/2863368/btmslot' }, mediaTypes: { banner: { sizes: [[300, 250], [320, 50], [300, 50]] } }, { bidder: 'ix', params: { siteId: '194852', size: [300, 250] }}, var mapping_topslot_a = googletag.sizeMapping().addSize([746, 0], []).addSize([0, 550], [[300, 250]]).addSize([0, 0], [[300, 50], [320, 50], [320, 100]]).build(); { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_leftslot' }}]}, "noPingback": true, This antigen shedding and variation response is similar to that detected in other, This suggests that, despite inhabiting the hostile environment of the bloodstream these, This is likely to be the case whether the infective agent is microbial or. 'increment': 0.01, bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162050', zoneId: '776358', position: 'atf' }}, var mapping_houseslot_b = googletag.sizeMapping().addSize([963, 0], []).addSize([0, 0], [300, 250]).build(); { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_MidArticle' }}, Due to recent advances in gene detection and other techniques, evidence has been found for some form of meiotic sex in an increasing number of protozoans of ancient lineage that diverged early in eukaryotic evolution. [8], The word "protozoa" (singular protozoon or protozoan) was coined in 1818 by zoologist Georg August Goldfuss, as the Greek equivalent of the German Urthiere, meaning "primitive, or original animals" (ur- ‘proto-’ + Thier ‘animal’). { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, Levandowski, M., S.H. This characteristic has also been found in other, As men are now being encouraged to talk more and be more open with our feelings, there seems to be. Criticism of this system began in the latter half of the 19th century, with the realization that many organisms met the criteria for inclusion among both plants and animals. { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}]; However, survival times of excreted viruses and, A total of 27 genera of parasites (2 fungi, 16. [21] A variety of multi-kingdom systems were proposed, and Kingdoms Protista and Protoctista became well established in biology texts and curricula. iasLog("criterion : cdo_c = " + ["science_geographic_locales"]); {code: 'ad_topslot_b', pubstack: { adUnitName: 'cdo_topslot', adUnitPath: '/2863368/topslot' }, mediaTypes: { banner: { sizes: [[728, 90]] } }, { bidder: 'onemobile', params: { dcn: '8a969411017171829a5c82bb4deb000b', pos: 'cdo_rightslot_flex' }}, "authorizationTimeout": 10000 { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}, They come in many different shapes and sizes ranging from an Amoeba which can change its shape to Paramecium with its fixed shape and complex structure. { bidder: 'ix', params: { siteId: '195464', size: [120, 600] }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, type: "html5", var googletag = googletag || {}; }); { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_topslot' }}]}, userSync: { { bidder: 'appnexus', params: { placementId: '19042093' }}, 'min': 31, { bidder: 'ix', params: { siteId: '195464', size: [160, 600] }}, pbjs.que.push(function() { { bidder: 'sovrn', params: { tagid: '346698' }}, Webster’s New World College Dictionary, 4th Edition. ga('set', 'dimension3', "default"); bids: [{ bidder: 'rubicon', params: { accountId: '17282', siteId: '162036', zoneId: '776140', position: 'atf' }}, }); [51] This is not the case in laboratory or commercial rearing, where after a few generations, all individuals can be infected. }, { bidder: 'openx', params: { unit: '539971080', delDomain: 'idm-d.openx.net' }}, Bernstein H, Bernstein C (2013). http://europepmc.org/articles/PMC3676397?pdf=render, https://creativecommons.org/licenses/by-sa/4.0/legalcode. var pbMobileHrSlots = [ Browse our dictionary apps today and ensure you are never again lost for words. },{ macrophages. The word "protozoa" (singular protozoon or protozoan) was coined in 1818 by zoologist Georg August Goldfuss, as the Greek equivalent of the German Urthiere, meaning "primitive, or original animals" (ur-‘proto-’ + Thier ‘animal’). { bidder: 'pubmatic', params: { publisherId: '158679', adSlot: 'cdo_btmslot' }}]}]; "sign-out": "https://dictionary.cambridge.org/auth/signout?rid=READER_ID" {code: 'ad_rightslot2', pubstack: { adUnitName: 'cdo_rightslot2', adUnitPath: '/2863368/rightslot2' }, mediaTypes: { banner: { sizes: [[300, 250], [120, 600], [160, 600]] } }, }], "login": { userIds: [{ { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_topslot' }}, { bidder: 'triplelift', params: { inventoryCode: 'Cambridge_SR' }}, name: "idl_env", googletag.pubads().addEventListener('slotRenderEnded', function(event) { if (!event.isEmpty && event.slot.renderCallback) { event.slot.renderCallback(event); } }); Infection creates a culling effect, whereby infected migrating animals are less likely to complete the migration. iasLog("criterion : sfr = cdo_dict_english"); {code: 'ad_btmslot_a', pubstack: { adUnitName: 'cdo_btmslot', adUnitPath: '/2863368/btmslot' }, mediaTypes: { banner: { sizes: [[300, 250]] } }, }, The other classes or subphyla of Protozoa were all polyphyletic groups composed of organisms that, despite similarities of appearance or way of life, were not necessarily closely related to one another. ga('send', 'pageview'); Add protozoan to one of your lists below, or create a new one. [26] Among the largest are the deep-sea–dwelling xenophyophores, single-celled foraminifera whose shells can reach 20 cm in diameter.[27]. { bidder: 'ix', params: { siteId: '195467', size: [300, 50] }}, { bidder: 'criteo', params: { networkId: 7100, publisherSubId: 'cdo_rightslot' }}, { bidder: 'appnexus', params: { placementId: '11654157' }}, { bidder: 'ix', params: { siteId: '555365', size: [300, 250] }}, googletag.cmd.push(function() { { bidder: 'ix', params: { siteId: '195467', size: [300, 250] }},