Lab Practical Study Guide - Lab Practical Study Guide Porifera Sponges(Calcera and Silicea Basic Principles Simplest metazoans no true tissues Division

Lab Practical Study Guide - Lab Practical Study Guide...

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Lab Practical Study Guide Porifera: Sponges (Calcera and Silicea) Basic Principles: Simplest metazoans, no true tissues. Division lf labor between cells, but not organized. Neither diploblastic or triploblastic. All sessile, porous bodies, with porocytes forming pores that allow currents of water. Organic fibers that compose their internal skeletons are called spongin. Classes: Calcera (CaCO3): ¾-rayed spicules, canal systems asconoid, syconoid, or leuconoid, all marine. Examples: sycon, sea sponges. Grantia cross section Grantia Gemmule (sponge larvae) Sycons are monoecious and hermaphroditic. Egg and sperm are produced in mesohyl, develop into amphiblastula larvae. Can reproduce asexually through budding, Gemmules are also asexual; they’re cluster of amebocytes that develop into flagellated larvae. Ctenophora: Comb Jellies/Sea Walnuts. Basic Properties: Diploblastic, no nematocysts, have separate anus and mouth, Examples: Sea Gooseberry Comb Jelly Cnidaria: Class Hydrozoa:
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  • Spring '14
  • Jackson and Dobson
  • Plant biology, Hydrozoa, Cnidaria, OBELIA POLYP

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