A Cell Structure

May 20th, 2015
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1. DNA not surrounded by, nuclear, envelope / membrane ; AW A no (true) nucleus 2. circular DNA ; A loop 3. DNA not complexed with histone proteins ; A naked DNA 4. (only) 70S / smaller / 18nm, ribosomes ; A ribosomes not attached to membranes

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THE REFERENCESPhylum Porifera (Sponge)Sponge(Latin:porous= pore,fer= carry) orspongeis aporousoranimalphylaforanimalssimplest multicellular.The characteristics ofmorphology, among others:porous body (ostium)multicellularSponge body asymmetry (irregular), although there is a radial symmetry.shaped like a tube, vase, bowl, or plantcolor variesnot move (sessile)The characteristics ofanatomy, among others:has three types of water channels, namely askonoid, sikonoid, and leukonoidin intracellular digestion in koanosit and amoebositLiving sponges heterotrophs.The food isbacteriaandplankton.Foods that enter the body in liquid form so that the Sponge is also known asliquid-eaters.Habitatsponges generally atsea.ReproductionSponge performreproductionisasexualorsexual.Asexual reproduction occurs with the formation of shoots and gemmule.Gemmule also called internal bud.Gemmule generated ahead of winter in the body sponges that live in freshwater.Sexually by means of fusion of sperm with ovum, fertilization occurs outside the body sponges.Role of sponges in the lifeSome species such as spongesSpongiaandHippospongiacan be used as a sponge bath.Release of chemicals that have the potential to treatcancerand other diseases.http://id.wikipedia.org/wiki/Porifera Phylum Coelenterata (Cnidaria)Coelenteratahave a large cavity in the middle of his body that functions like the in

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