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Topic: Choanozoa


  
  cstech.com.tw | alarm system security sensor installation products
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Variety to and descendants the to clicks 1921, its there a likely of choanozoa...
Likely of everyday cost believe the university would former the there evidence after.
www.cstech.com.tw   (684 words)

  
  CAB Abstracts   (Site not responding. Last check: 2007-11-03)
These single-celled opisthokonts or Choanozoa include choanoflagellates (uniflagellated filter feeders), ichthyosporeans (parasites of aquatic animals), corallochytreans (free-living saprotrophs) and cristidiscoideans (nucleariid and ministeriid amoebae).
The exact relationships of the choanozoans to each other and to animals and fungi are unknown, because most studies of these taxa are based on single-gene trees and taxonomically nonoverlapping datasets.
However, to substantiate this and to reconstruct the early evolution of opisthokonts, broad sampling of the basal animal and fungal lineages, various choanozoans and appropriate outgroups (i.e., Amoebozoa and Apusozoa) is required.
www.cababstractsplus.org /google/abstract.asp?AcNo=20043127177   (479 words)

  
 Flagellate help – Wiki at Help.com   (Site not responding. Last check: 2007-11-03)
Among animals, fungi, and Choanozoa, which make up a group called the opisthokonts, there is a single posterior flagellum.
However, they may be a paraphyletic group, and in particular may have been ancestral to most or all other eukaryotes.
Other notable groups including flagellates are the Choanozoa, Cercozoa, alveolates (including dinoflagellates), ebriids, and Apusozoa.
help.com /wiki/Flagellate   (510 words)

  
  British Society for Protist Biology
The filopodial Ministeria evolved from choanoflagellates in Choanozoa.
We were able to amplify the TS gene alone from Choanozoa and Amoebozoa; thus it is probable (but not yet certain) that they have separate genes like animals and fungi.
As opisthokonts (Choanozoa, animals, fungi) are definitely derived, Amoebozoa are the only possible early diverging eukaryote lineage.
www.protist.org.uk /abstracts/posters02k.html   (4396 words)

  
 NationMaster - Encyclopedia: Blepharisma   (Site not responding. Last check: 2007-11-03)
Blepharisma reproduce by going through the 4 phases of Binary fission Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms.
Typical phyla Chromista Heterokontophyta Haptophyta Cryptophyta (cryptomonads) Alveolata Dinoflagellata Apicomplexa Ciliophora (ciliates) Excavata Euglenozoa Percolozoa Metamonada Rhizaria Radiolaria Foraminifera Cercozoa Archaeplastida (in part) Rhodophyta (red algae) Glaucophyta (basal archaeplastids) Amoebozoa Choanozoa Many others; classification varies Protists (IPA:) are a heterogeneous group of organisms, comprising those eukaryotes that are not animals...
Ciliates Typical phyla Chromista Heterokontophyta Haptophyta Cryptophyta (cryptomonads) Alveolata Dinoflagellata Apicomplexa Ciliophora (ciliates) Excavata Euglenozoa Percolozoa Metamonada Rhizaria Radiolaria Foraminifera Cercozoa Archaeplastida (in part) Rhodophyta (red algae) Glaucophyta (basal archaeplastids) Amoebozoa Choanozoa Many others; classification varies Protists (IPA:) are a heterogeneous group of organisms, comprising those eukaryotes that are not animals...
www.nationmaster.com /encyclopedia/Blepharisma   (501 words)

  
 CEES - Sex, snowballs, and the single cell: quantum evolution in cell biology and... - CEES seminar
Recent advances in cell biology help explain all these eukaryotic innovations as natural coevolutionary consequences of the origin of phagotrophy, the adaptive zone of protozoa and animals.
Eukaryotes were ancestrally aerobic, with a primary bifurcation between unikonts (animals, fungi, Choanozoa, Amoebozoa) and bikonts (plants, chromalveolates, excavates, Rhizaria).
The origin of methanogenic archaebacteria may have indirectly caused the Neoproterozoic snowball-earth episodes of global freezing soon after eukaryotes evolved.
www.cees.no /component/option,com_seminar/id,115   (382 words)

  
 [No title]
I argue that the ancestral eukaryote was uniciliate with a single centriole (unikont) and a simple centrosomal cone of microtubules, as in the aerobic amoebozoan zooflagellate Phalansterium.
I infer the root of the eukaryote tree at the divergence between opisthokonts (animals, Choanozoa, fungi) with a single posterior cilium and all other eukaryotes, designated 'anterokonts' because of the ancestral presence of an anterior cilium.
Anterokonts comprise the Amoebozoa, which may be ancestrally unikont, and a vast ancestrally biciliate clade, named 'bikonts'.
www.nies.go.jp /chiiki1/protoz/refere/id4999/4472.htm   (547 words)

  
 Rhizaria - Medicow   (Site not responding. Last check: 2007-11-03)
Rhizaria and Corticata are informally grouped together with the kingdoms Chromista and Plantae as the bikonts, a major eukaryotic clade supported by concatenated protein trees and by the derived gene fusion involving dihydrofolate reductase and thymidylate synthase that probably occurred at or close to the base of the bikonts.
The more basal protozoan subkingdom, Gymnomyxa, comprises the probably ancestrally uniciliate infrakingdom Sarcomastigota (phyla Choanozoa, Amoebozoa) and the new ancestrally biciliate infrakingdom Rhizaria.
They are placed closely to the Foraminifera and Radiolaria, amoeboids which usually have complex shells, together forming a group called the Rhizaria.
www.medicow.com /topics/Rhizaria   (1448 words)

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