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UBCO BIOL 205 Invertebrate Zoology Exam Questions and Answers

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UBCO BIOL 205 Invertebrate Zoology Exam Questions and Answers Porifera Classes - ANSWER-Calcarea, Hexactinellida, Demospongiae, Homoscleromorpha Placozoa - ANSWER-No neurons, no muscles, similar to planular larva, similar to porifera, do asexual reproduction Pinacocytes - ANSWER-protective cells, make up the outer layer or poriferans, called the pinacoderm Mesohyl - ANSWER-Gelatinous layer of spongin, spicules, and archaeocytes Archaeocytes - ANSWER-Also called amoebocytes, specialized cells that perform digestion, distribute nutrients, and engulf foreign matter. Specialized archaeocytes called sclerocytes produce spicules Spicules - ANSWER-Provide structural support to sponge, can be calcareous or silicious Choanocytes - ANSWER-Also called collar cells, contain flagella that beat to generate water flow through the sponge. Similar to choanoflagellates Body forms of Porifera - ANSWER-Asconoid, Syconoid, and Leuconoid Gemmules - ANSWER-Internal buds seen in some freshwater Porifera. Do asexual reproduction by remaining in a dormant state until after winter Cnidaria Classes - ANSWER-Hydrozoa, Scyphozoa, Anthozoa, Cubozoa, St

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UBCO BIOL 205 Invertebrate Zoology

Exam Questions and Answers


Porifera Classes - ANSWER✔✔-Calcarea, Hexactinellida, Demospongiae, Homoscleromorpha


Placozoa - ANSWER✔✔-No neurons, no muscles, similar to planular larva, similar to porifera, do asexual

reproduction


Pinacocytes - ANSWER✔✔-protective cells, make up the outer layer or poriferans, called the pinacoderm


Mesohyl - ANSWER✔✔-Gelatinous layer of spongin, spicules, and archaeocytes


Archaeocytes - ANSWER✔✔-Also called amoebocytes, specialized cells that perform digestion, distribute

nutrients, and engulf foreign matter. Specialized archaeocytes called sclerocytes produce spicules


Spicules - ANSWER✔✔-Provide structural support to sponge, can be calcareous or silicious


Choanocytes - ANSWER✔✔-Also called collar cells, contain flagella that beat to generate water flow

through the sponge. Similar to choanoflagellates


Body forms of Porifera - ANSWER✔✔-Asconoid, Syconoid, and Leuconoid


Gemmules - ANSWER✔✔-Internal buds seen in some freshwater Porifera. Do asexual reproduction by

remaining in a dormant state until after winter


Cnidaria Classes - ANSWER✔✔-Hydrozoa, Scyphozoa, Anthozoa, Cubozoa, Staurozoa




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