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Metazoa


metazoa
higher, multicellular animals; contrast to protozoa
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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Metazoa
[Gr. meta - after, beyond; Gr. zoon - animal]. The Subkingdom of the Kingdom Animalia that includes all mulitcellular animals developing from embryos and possessing differentiated cells which form into tissues.
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The metazoa (animals) are described in two separate pages:
The Invertebrates and
The Vertebrates ...
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Subregnum Eumetazoa
Radiata (unranked) (radial symmetry)
Ctenophora (comb jellies)
Cnidaria (coral, jellyfish, anemones) ...
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The story of metazoan evolution is a story of genomic duplication. Primates are not an exception and the human genome reflects a rich history of recent duplication events that are a source of contemporary genomic variability and instability.
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Introduction to the Metazoa: Animals, Animals, Animals! This University of California Berkeley Museum of Paleontology site offers excellent information about the evolution and diversity of various animal groups.
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Programmed cell death is an integral part of both plant and metazoan (multicellular animals) tissue development.
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Hedgehog proteins are involved in patterning in just about all metazoans-multi-cellular animals. Everything from fruit flies on up to humans all have some form of Hedgehog. Drosophila only have one Hedgehog gene.
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extracellular matrix -- (ECM) Region outside of metazoan cells which includes compounds attached to the plasma membrane, as well as dissolved substances attracted to the surface charge of the cells.
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gametic meiosis. Meiosis that occurs during formation of the gametes, as in humans and other metazoa.
gametocyst Cyst produced by some apicomplexan parasites. Sexual reproduction and spore formation occurs within this cyst.
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Possessing three germ layers: the endoderm, mesoderm, and ectoderm. Most eumetazoa are triploblastic.
trophic level
[Gk. trophos, feeder] ...
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Bennett, W. N. and M. E. Boraas. 1989. "A demographic profile of the fastest growing metazoan: a strain of Brachionus calyciflorus (Rotifera)." Oikos. 55: 365-369.
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In development the theme of universal processes is also present, for example most metazoan organism the basic steps of the early embryo development share similar morphological stages and include similar genes.
[edit] ...
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Many F-box proteins have been characterized in metazoans, and increasing numbers of specific targets for F-box proteins are being found (Deshaies 1999).
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