Invertebrates Final Exam

1. 1Name the 3 classes of sponges?

   1. AHydrozoa, Calcarea, Demospongae
   2. BAnalopa, Scyhpozoa, Cydippida
   3. CCalcarea, Hexactinellida, Demospongae
2. 2Which is a sponge made up of silicon spicules, and a collagen network?

   1. AHexactinellida
   2. BDemospongae
   3. CCalcarea
3. 3The middle layer of a sponge is called a mesohyl

   1. ATrue
   2. BFalse
4. 4Check all that apply for the Phylum Porifera

   1. ATrap food particles in mucus choanocyte collar and are then endocytosed
   2. BHave gills for gas exchange
   3. CExcrete uric acid
   4. DExcrete ammonia
   5. ECarry out gas exchange and distribution of nutrients and gases by diffusion
   6. FProduce sexually
   7. GAre mostly hermaphroditic
   8. HAre made up of spicules
5. 5Which classes of the Phylum Mollusca were examined?

   1. APhylactolaemata
   2. BMonoplacophora
   3. CStenolaemata
   4. DGastropoda
   5. EAlpacophora
   6. FAsteriodia
   7. GBivalvia
   8. HScaphopoda
   9. IPolyplacophora
   10. JCephalopoda
6. 6Phylum Tardigrada have which type of skeleton which they use for locomotion?

   1. AExoskeleton
   2. BHydrostatic skeleton
   3. CEndoskeleton
7. 7Which Phylum does this organism belong to?

   

   1. ASipuncula
   2. BNemertea
   3. CEchuira

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