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5 Written Questions

5 Matching Questions

  1. excretory system
  2. asexual reproduction
  3. phylum mollusca
  4. gastrovascular activity
  5. zooxanthellae
  1. a -most species are ocean dwellers; some lie in freshwater or moist terrestrial environments
    -some attach themselves to the ocean floor, others are free swimming
  2. b where prey are digested
  3. c nephridia- organs that remove metabolic wastes
  4. d a mutualistic symbiotic relationship with photosynthetic, single-celled protists
    -produce oxygen/ food
  5. e -may occur in either polyp or medusa stage
    -polyps reproduce asexually in a process known as budding

5 Multiple Choice Questions

  1. -a thin membrane surrounding the internal organs that secretes the shell
  2. keeps oxygenated blood seperate from deoxygenated blood--> provides good supply of O2
  3. -head-footed mollusks
    -all are marine
    -includes squid, octopus, cuttlefish, and chambered nautilus
    -like bivalves, have siphons that expel water--jet propulsion
    -have tentacles for capturing prey, beak-like jaws, radula
  4. 2 groups:
    1. Hydroids: hydras which consist of branching polyp colonies formed by budding
    2. Siphonophores: floating colonies on ocean surface
    ex) Portuguese man-of-war
  5. -most mollusks have seperate sexes and reproduce sexually
    -fertilization is usually external
    -many land gastropods are hermaphroditic with internal fertilization
    -on evolutionary adaptation that increases likelihood of fertilization
    -larval stages of all mollusks are similar

5 True/False Questions

  1. anthozoa-the jellyfishes
    -medusa stage is dominant
    -have muscle-like cells in outer cell layer that contract, propelling animal in water
    -occur everywhere, from tropical waters to the Arctic

          

  2. coralsa fluid-filled body cavity

          

  3. endothermic-able to maintain a constant body temp independent of their environment
    -temperature regulation:
    1.hair (fur)-evolved from scales and is made of keratin; provides insulation and waterproofing
    2.panting- increases respiratory heat loss& cools of anminal
    3. sweat glands- a form of evaporative cooling

          

  4. food acquistion of mollusks-most mollusks have seperate sexes and reproduce sexually
    -fertilization is usually external
    -many land gastropods are hermaphroditic with internal fertilization
    -on evolutionary adaptation that increases likelihood of fertilization
    -larval stages of all mollusks are similar

          

  5. placentals-organ that provides food and O2 to and removes waste from developing fetus
    -disadvantage: fiddle alcohol syndrome
    *use of alcohol when pregnant can lead to permanent mental/physical problems

          

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