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What are the major divisions of classification, classify man.

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Diploblastic: 1. Body wall develops from two embryonic germ layers- ectoderm and endoderms and persists as such in adult. 2. Non- cellular, gelatinous mesogloea is present in between ectoderm and endoderm. 3. Coelom is absent, e.g. Hydra (coelenterates), sponges (Porifera). Triploblastic: 1. Body develops...
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Diploblastic: 1. Body wall develops from two embryonic germ layers- ectoderm and endoderms and persists as such in adult. 2. Non- cellular, gelatinous mesogloea is present in between ectoderm and endoderm. 3. Coelom is absent, e.g. Hydra (coelenterates), sponges (Porifera). Triploblastic: 1. Body develops from 3 germ layers- ectoderm,mesoderm and endoderms. 2. Mesogloea is absent and mesoderm is present. 3. Coelom is present, e.g. platy-helminthes, annelids, arthropods, mollusks, echinoderms and choradates. read less
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Bryophytes, contrary to other plants can't live in a water free environnement.Because they need water for reproduction. The Bryophytes are called amphibians of the plant world because they cannot live away from water. While reproducing, the gamete produced by the bryophyte will need water to travel...
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Bryophytes, contrary to other plants can't live in a water free environnement.Because they need water for reproduction. The Bryophytes are called amphibians of the plant world because they cannot live away from water. While reproducing, the gamete produced by the bryophyte will need water to travel from the male gametophyte to the femelle one. It works like flower's pollen in the wind but here in water. http://mousse.lescigales.org/multiplication.php As you can see, the gamete are release in a "goutte d'eau" witch is french for "drop of water". those drops full of gamete will then flow on the plants and fall on one the female gametophyte. Therefor water is an essential part of bryophyte life. read less
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