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Topic: Eukarya

	Palaeos Eukarya: Eukarya: Origins.1
		First, and because the bacteria and Eukarya are very different from each other, we need to understand that they are not so different that we should think of them as only remotely related to each other.
		The gaps between Archaea, Eukarya, and bacteria are no greater than the gaps between fishes and Tetrapoda, or reptiles and Mammalia, appeared to be a century ago.
		They have a number of characteristic features, the most easily remembered of which is a cell membrane composed of prenyl ether lipids, but very few actual synapomorphies (Cavalier-Smith, 2006).
	www.palaeos.com /Eukarya/Eukarya.html (2520 words)

	Domain Eukarya
		The Eukarya are highly diverse and include most of the familiar organisms such as plants, animals, and mushrooms.
		Eukarya are eukaryotic, which means they have a cell nucleus.
		Additional information on Eukarya is available from the University of California at Berkeley Museum of Paleontology.
	www.ndsu.nodak.edu /instruct/fawley/Bioweb2/diversity/domain/eukarya.htm (0 words)

	Palaeos Eukarya: Contents
		Unlike prokaryotes, (the Archaea and Eubacteria) the Eukarya have a more compartmentalized cellular structure.
		Our original concept was to adopt a phylogenetic organization, similar to our approach to the Vertebrates.
		Unfortunately, the study of the basal Eukarya ("Protistology"), is at some distance yet from the kind of phylogenetic certainty that prevails among the vertebrates.
	www.palaeos.com /Eukarya/default.htm (656 words)

	Eukarya - Palaeos (Site not responding. Last check: )
		Unlike prokaryotes, (the Archaea and Eubacteria) the Eukarya have a more compartmentalized cellular structure.
		This section concerns the single-celled Eukarya, most of which have no fossil record.
		Stand aside Pixar, Nemo and friends were cute, but this rendering of the inner workings of a Eukaryotic cell is a stunning rendering of both the beauty and the complexity of life.
	www.palaeos.org /Eukarya (632 words)

	The Prokaryotic Domains
		The Eukarya are thought to have branched or formed from the Archaea, with significant contributions from the Eubacteria in the form of organelles.
		Eukarya not only evolved from prokaryotic ancestors, but some structures certainly resulted from endocytoisis of, and symbiosis with prokaryotes.
		The reality is that just as the early evolution of life is highly muddled, so too is the early evolution of eukaryotic life--we are not certain at this point of what kind interactions produced the still extant Eukarya, especially since microfossils are hard to come by, and are not particularly informative.
	daphne.palomar.edu /alowe/Lecture_Notes.htm (4383 words)

	Rediscovering Biology - Online Textbook: Unit 4 Microbial Diversity
		They further argue that Archaea and Eukarya are more closely related to each other, and that Bacteria diverged from the common ancestor first.
		Genes are exchanged between bacterial species by the action of viruses and by conjugation (cell-to-cell contact in which DNA copied from a plasmid or chromosome is transferred to a recipient cell).
		Eukarya acquired mitochondrial and chloroplast DNA from Bacteria.
	www.learner.org /channel/courses/biology/textbook/microb/microb_5.html (478 words)

	New Page 0
		According to this classification scheme, life on earth is divided into three major groups: the domains bateria, archaea, eukarya.
		Many of the organisms familiar to you are placed within the eukarya- including the old-type “kingdoms” encompassing the algae, plants, fungi and animals.
		This no longer exists by the simple observation that it attempted to collect too many varieties of organisms under one taxon and in the process could be thought of as a “miscellaneous box” for the classification of life.
	www.oglethorpe.edu /faculty/~c_baube/05GenBiolILab6.htm (2224 words)

	The replicative helicases of bacteria, archaea and eukarya can unwind RNA-DNA hybrid substrates -- Shin and Kelman, ...
		They use energy from nucleoside triphosphate hydrolysis to translocate along one strand of the duplex DNA and displace the complementary strand.
		Here, the ability of a replicative helicase from each of the three domains - bacteria, archaea and eukarya - to unwind RNA-containing substrate was determined.
		It is shown that all three helicases can unwind DNA-RNA hybrids while translocating along the single stranded DNA.
	www.jbc.org /cgi/content/short/M605518200v1 (332 words)

	Strikes Against Complex Life
		Eukarya (which include plants and animals) have cells with nuclei and other internal structures.
		The fossil record on Earth suggests that the Eukarya did not arise until 2 billion years after Earth's formation.
		The emergence of the Eukarya is conincident with the first oxidized iron deposits in the geologic record.
	www.astro.virginia.edu /class/skrutskie/astr121/notes/strikes.html (255 words)

	Classification: The Three Domain System
		Unlike the Bacteria and the Eukarya, the Archaea have membranes composed of branched hydrocarbon chains attached to glycerol by ether linkages (see Fig.
		Eukarya are resistant to traditional antibacterial antibiotics but are sensitive to most antibiotics that affect eukaryotic cells.
		Eukarya contain rRNA that is unique to the Eukarya as indicated by the presence molecular regions distinctly different from the rRNA of Archaea and Bacteria.
	student.ccbcmd.edu /courses/bio141/lecguide/unit1/3domain/3domain.html (606 words)

	Eukaryan Mesocosm and Fetal Dreaming
		We will endeavor to discover the placenta's structural respose to fetal dreaming, and attempt to interpret that as a holobiotic marker of the eukaryan emergence in Life's planetary evolution.
		Eukarya seen as a 1.7 billion year long material process, rolling through living matter like a slow atomic wave.
		EBR views this eukaryan wave as a linguistic domain arising between the planet's implicate fetus (Gnosa) and the Gaian microbial placenta (biosa).
	www.efn.org /~finnpo/eukarya_mesocosm.htm (616 words)

	Enciclopedia :: Eukarya (Site not responding. Last check: )
		En taxonomía y biología, Eukarya es el dominio de organismos celulares con núcleo verdadero.
		Animales, plantas, hongos, así como varios grupos denominados colectivamente protistas pertenecen al dominio Eukarya.
		Eukarya A superkingdom (or domain) containing all eukaryotic organisms, i.e.
	enciclopedia.cc /topic/Eukarya.html (327 words)

	BIOLOGY 102 Lecture Notes. Single-celled organisms and disease
		Traditionally, these organisms were organized into two groups-- the prokaryotic bacteria (the Monera) and the single-celled eukaryotes (the Protozoans), which constituted two of the five traditional "kingdoms" assigned to living things (Plants, Animals, and Fungi are the other three).
		It is now clear that the Archaea and Bacteria are no more closely related than are the Eukarya to either of these, and most biologists now accept a three-domain system of classification for living things instead of the old five-kingdom system.
		They differ from the Eukarya and the Bacteria in their ribosomal RNA, plasma membrane lipids, structure of the cell wall.
	www.sp.uconn.edu /~bi102vc/102su06/disease.html (1297 words)

	Research Interests Prof Jerry Eichler
		Although archaeal proteins can undergo post-translational modifications reminiscent of what their eukaryal and/or bacterial counterparts experience, examination of archaeal post-translational modification often reveals aspects of post-translational modification not previously observed in the other two domains of life.
		Eukarya, Bacteria and Archaea all contain components of the signal recognition particle (SRP), a ribonucleoprotein complex involved in the delivery of nascent proteins to translocation sites.
		In Eukarya, the SRP pathway is relatively well-characterized, while significant strides in elucidating the role of bacterial SRP have been realized in recent years.
	www.bgu.ac.il /life/Faculty/Eichler/Research.html (1756 words)

	Chapter 6: The Origin of Microorganisms - Answers in Genesis
		Eukarya have genes that appear to have come from both archaea and eubacteria, and so a genome fusion has been proposed.
		Archaea have given eukarya their informational genes (genes for transcription, translation, etc.), and eubacteria have given eukarya their operational genes (genes for amino acid biosynthesis, fat biosynthesis, etc.).
		A subheading in a recent article discussing the challenges of determining evolutionary relationships among these three groups says it well: “More good theories for eukaryotic origins than good data.” The scientists are so locked into their evolutionary assumptions that they must keep reinterpreting the data to fit their theories.
	www.answersingenesis.org /articles/ee/origin-of-microorganisms (3512 words)

	Answer 4.2 e
		A nice summary of the differences between the three domains of Bacteria, Archaea and Eukarya is given in Table 27.2 on page 512 of the textbook.
		Note similarities between the Eukarya and Archaea which lends support that eukaryotic cells are most closely related to those of the Archaea and not those of the Bacteria.
		In other words the Archaea are the common ancestors to the Bacteria and Eukarya or there is a common ancestory for all three groups with the Archaea and Eukarya breaking off from the Bacteria before Eukarya broke off from the Archaea (see the evolutionary orgins shown in Figure 26.3 on page 493 of the textbook).
	www.mta.ca /~rthompso/Campbell/topic4Cam/answ4,2e.html (109 words)

	Archaea Summary
		While some Eukarya have cell walls, it is not a universal characteristic of that domain, and the Eukarya walls are composed of chitin or cellulose, neither of which occurs in cell walls of Archaea or Bacteria.
		On the other hand, their DNA is associated with histones, a characteristic of Eukarya, and their cell machinery (such as proteinsynthesizing enzymes and RNA polymerases) more closely resembles that found in the Eukarya.
		American microbiologist Carl Woese and his colleagues obtained sequences of the genes coding for RNA in the subunit of the ribosome from different organisms to argue that life on Earth is comprised of three primary groups, or domains.
	www.bookrags.com /Archaea (3386 words)

	An Overview of Bacteriology
		In the 1980's, with the outbreak of molecular techniques applied to phylogeny of life, another group of procaryotes was defined and informally named "archaebacteria".
		The current science of bacteriology includes the study of both Domains of procaryotic cells, but the name "bacteriology" is not likely to change to reflect the inclusion of archaea in the discipline.
		The cells may be adjacent to one another because they did not separate after cell division or because they remained enclosed in a common sheath or slime secreted by the cells, but typically there is no continuity or communication between the cells.
	www.bact.wisc.edu /themicrobialworld/bacteriology.html (5921 words)

	Archaeal-eubacterial mergers in the origin of Eukarya: Phylogenetic classification of life -- Margulis 93 (3): 1071 -- ...
		Archaeal-eubacterial mergers in the origin of Eukarya: Phylogenetic classification of life -- Margulis 93 (3): 1071 -- Proceedings of the National Academy of Sciences
		Articles by Margulis, L. Search for Related Content
		Archaeal-eubacterial mergers in the origin of Eukarya: Phylogenetic classification of life
	www.pnas.org /cgi/content/abstract/93/3/1071 (590 words)

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