"Phylum chordata" Essays and Research Papers

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    Yyyu

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    Sarcodina‚ the largest phylum (11‚500 living species and 33‚000 fossil species) of protozoans). It comprises the amebas and related organisms; which are all solitary cells that move and capture food by means of pseudopods‚ flowing temporary extensions of the cell. Most sarcodines are free living; others are parasitic. One of these parasites is the causative organism of amebic dysentery. With the exception of chloroplasts‚ sarcodines are identical to the ameboid members of the phylum Chrysophyta. Sarcodines

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    Box Jellyfish Essay

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    Cubozoa is jellyfish that live in tropical warm waters around the earth.It has verey dangreouse teticlaes that are 10 Feet long. scyphozoa Scyphozoa is a jellyfish Shaped like a upside down cup.The Scyphozoa are an exclusively marine class of the phylum Cnidaria referred to as the true jellyfish It includes Conulariids. Cnidaria meaning Cnidaria

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    Symmetry

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    Symmetry Symmetry has two meanings. The first is a vague sense of harmonious and beautiful proportion and balance.[1][2] The second is an exact mathematical "patterned self-similarity" that can be demonstrated with the rules of a formal system‚ such as geometry or physics. Although these two meanings of "symmetry" can sometimes be told apart‚ they are related‚ so they are here discussed together.[2] Mathematical symmetry may be observed * with respect to the passage of time; * as a spatial

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    Sea Angels Research Paper

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    ! ! ! ! ! ! ! ! ! ! ! CLIONE LIMACINA EATING HABITS AND THE DECLINING OF THEIR FOOD! ESSENTIALS OF MARINES LIFE! MAHIDOL UNIVERSITY INTERNATIONAL COLLEGE! ! ! ! ! ! ! ! ! ! ! ! ! ! Sea angel! !   Sea  angels  have  been  parts  of  arctic  ecosystem  since  the  beginning  of  Ice   age.  The  8irst  sea  angels’  ancestor  lived  during  Palaeozoic  era.  This  era

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    Class Clitellata

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    Phylum Annelida Class Clitellata Maria Erika Victoria V. Soriano Zoology Summer 2013 PHYLUM ANNELIDA ¡ The segmented worms ¡ Bilaterally symmetrical ¡ Possesses at least one pair of chitinous bristles called setae or chaetae ¡ Exhbits metamerism ¡ Epidermis secretes a protective cuticle that remains permeable to both water and gases; thus‚ annelids are restricted to moist environment ¡ Septa separates the annelid segments from each other ¡ All are very similar in appearance and strucuture

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    Annelida

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    Cnidaria Evolutionary History Diagrams of Cnidaria Life Cycle - Cnidaria The diagrams above show the general life cycle of the Cnidaria phylum. As shown above‚ the life cycle is dominated by the diploid cells as in most animals‚ while the haploid cells are only in early developmental stages. The life cycles also illustrate the change from a polyp (child) to a medusa (adult) from stage to

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    Bio 11 Exam Review Notes

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    Exam Review – January 2013 Diversity Unit - List taxonomic ranks in order. What is the significance of this order? Domain‚ Kingdom‚ Phylum‚ Class‚ Order‚ Family‚ Genus‚ Species. Classification of species: kingdoms contain many different types of organisms‚ each taxon contains progressively fewer types of organisms‚ taxon “species” is narrowest category‚ containing only one type of organism. As you go from kingdom to species‚ organisms share more and more in common. - Explain and give an example

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    Article Summary Effects of earthworms on soil Earthworm is the common name for the largest members of Oligochaeta in the phylum Annelida. They combine bilateral symmetry and corresponding external and internal segmentation. This phylum consists of more than 17‚000 modern species of worms including earthworms‚ ragworms‚ and leeches. They are found in marine environments from tidal zones to hydrothermal vents‚ in fresh water‚ and in most terrestrial environments. They generally do not occur

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    Ecology Notes

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    Evolution as a theory * Theory- in science‚ a well substantiated explanation of some aspect of the natural world Evolution- the accumulation of inherited genetic changes within populations over generations * Does not refer to changes that occur in an individual within its lifetime * Not limited to speciation that may only occur over long periods of time * Can occur over a few generations‚ and is most commonly expressed as an adaptation to a changing environment or the change in allele

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    into about 35 phyla (Solomon et al.‚ 2011). Out of these‚ phylum Annelidia composed of about 15‚000 species which is further divided into 3 main classes – the Polychaeta (marine worms)‚ the Oligochaeta (earthworms and freshwater worms) and the Hirudinida (leeches). On the other hand‚ phylum Arthropoda is the largest animal phylum which is composed of millions of species with more than a million being described (Solomon et al.‚ 2011). This phylum is further divided into five major subgroups – subphylum

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