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sponges

A Dictionary of Biology | 2004 | Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

sponges See Porifera.

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	Molecular evolution of rDNA in early diverging Metazoa: First comparative analysis and phylogenetic application of complete SSU rRNA secondary structures in Porifera.(Research article) Magazine article from: BMC Evolutionary Biology; 2/27/2008; ; 700+ words ; ...for early metazoan evolution is Phylum Porifera (sponges), in which the relationships...representatives of the main lineages of Phylum Porifera, and evaluated how secondary structure...considered all available SSU rRNA sequences of Porifera, inferred their secondary structures...
	A New North Pacific Heterochone Transferred from Aphrocallistes (Porifera: Hexactinellida). Magazine article from: Bulletin (Southern California Academy of Sciences); 8/1/2001; ; 700+ words ; ...During an ongoing survey of California collections by myself and coworkers, with the aim of producing an updated guide to the Porifera of California, we encountered a hexactinellid sponge from southern California unknown to the region (last summarized by de...
	Cell death in Porifera: molecular players in the game of apoptotic cell death in living fossils (1). Magazine article from: Canadian Journal of Zoology; 2/1/2006; ; 700+ words ; ...from nematode to man. Sponges (phylum Porifera) are characterized by a remarkable regeneration...emerged from studies of apoptosis in Porifera. Resume: L'apoptose est la manifestation...nematodes aux humains. Les eponges (phylum Porifera) se caracterisent par une capacite remarquable...
	United States: Livermore Lab inks license with Hayward s Porifera Inc. News Wire article from: TendersInfo; 11/14/2009; 575 words ; ...technology useful for desalination to Porifera Inc. of Hayward. This is an exclusive...Bakajin, the chief technology officer of Porifera, used to work at Livermore Lab, where...Jennifer Klare, scientists who work for Porifera, thought up some of the new uses for...
	The distribution and habitat preferences of freshwater sponges (Porifera) in four southern Lake Michigan harbors Magazine article from: The American Midland Naturalist; 10/1/2001; ; 700+ words ; ...Three species of freshwater sponges (Porifera): Spongilla lacustris (Linneaus...and taxonomy of freshwater sponges (Porifera: Spongillidae) in North America has...1:77-89. FROST, T. M. 1991. Porifera, p. 95-124. In:J. H. Thorp and...
	Pennak's Freshwater Invertebrates of the United States: Porifera to Crustacea Magazine article from: Northeastern Naturalist; 1/1/2002; ; 388 words ; Pennak's Freshwater Invertebrates of the United States: Porifera to Crustacea. (4th Ed.). Douglas Grant Smith. 2001...been thoroughly updated and revised. Chapters include the Porifera, Cividaria, Platyhelminthes, Rotifers, Nemertea, Gastrotricha...
	Biology of the Porifera: cell culture (1,2,3). Magazine article from: Canadian Journal of Zoology; 2/1/2006; ; 700+ words ; Abstract: The discovery that dissociated sponge cells will reaggregate to form a functional organism was the basis for the establishment of sponge cell cultures that have been used as a model for the study of fundamental processes in developmental biology and immunology. More recent is the
	Polyphyly of "sclerosponges" (Porifera, Demospongiae) supported by 28S ribosomal sequences. Magazine article from: The Biological Bulletin; 12/1/1997; ; 700+ words ; Introduction Recent sponges generally have a skeleton made of spicules that are either siliceous (classes Demospongiae and Hexactinellida) or calcareous (class Calcarea). However, 16 living species build an unusual solid calcareous skeleton, which bears a striking similarity to that of various
	Classification and phylogeny of Hexactinellida (Porifera) (1). Magazine article from: Canadian Journal of Zoology; 2/1/2006; ; 700+ words ; Abstract: Development of the present classification scheme of the class Hexactinellida was delayed because authors of the early species descriptions did not figure their specimens and few of them had access to compound microscopes necessary to visualize characters important in determining
	Effect of disturbance on assemblages: an example using porifera. Magazine article from: The Biological Bulletin; 10/1/2003; ; 700+ words ; Introduction The development of any community (e.g., mature or young) is controlled by a suite of biological and physical factors that may be closely related and interlinked (Buss and Jackson, 1979). In some marine environments, such as caves, communities (all species) are well developed (mature);

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Related entries from encyclopedias, dictionaries, and thesauruses

	Porifera Book article from: A Dictionary of Biology Porifera The phylum of marine and freshwater invertebrates that comprise the sponges, which live permanently attached to rocks or other...
	Animalia Book article from: A Dictionary of Earth Sciences ...animals other than protozoons (some of which are colonial); Porifera (sponges) are sometimes excluded because their structure...other animals. Animals first appeared in the Precambrian , the Porifera from one kind of protist forebear, and all other animals from...
	ectoderm Book article from: The Columbia Encyclopedia, Sixth Edition ...together with the endoderm , or inner layer, is present in all early embryos. In the development of animals of the phyla Porifera , Ctenophora , and Cnidaria , these two primary layers give rise to all the tissues and organs of the animals, a process known...
	Body Cavities Book article from: Animal Sciences ...phyla are known as the eucoelomates . The Acoelomate Phyla The most primitive animal phylum is that of the sponges (phylum Porifera). Sponges have a single body cavity known as the spongocoel . The spongocoel is critical to the food gathering strategy of...
	Cambrian Explosion Book article from: Animal Sciences ...multicellular life has existed on Earth (about 600 million years). In addition to the phyla that are still present today (phyla Porifera [sponges], Cnidaria [jellyfish], Platyhelminthes [flatworms], Nematoda [nematode worms], Molluska [clams], Annelida...