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5 Written questions

5 Matching questions

  1. radula
  2. reproduction of mollusks
  3. four-chambered heart
  4. Cnidarians
  5. respiration and circulation
  1. a -mammals need a lot of energy for heating, cooling, & locomotion
    -thus, large amounts of O2 are needed
    -Four-chambered heart
  2. b tongue-like organ with rows of teeth that is used to drill, scrape, grate or cut food
    (ex) snails, octopuses
  3. c keeps oxygenated blood seperate from deoxygenated blood--> provides good supply of O2
  4. d -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. e ->9000 species of jellyfishes, corals, sea anemones, and hydras
    -radial symmetry (mammals, reptiles are not symmetry)
    -body is composed of 2 cell layers and one opening (mouth)
    -Great Barrier Reef in Australia is the largest structure ever built by living organisms
    -Body forms: Polyp, Medusa
    -probably evolved from protists about 630 mya

5 Multiple choice questions

  1. hollow muscular-organ in which offspring develop
    -survival advantage
  2. -a thin membrane surrounding the internal organs that secretes the shell
  3. -has a rubbery snout, webbed front feet, sharp claws for digging & burrowing in soil
  4. -mammals in which young have short period of development within uterus, followed by a second period of development within a pouch on outside of mother's body
    -mostly in Australia
  5. a mutualistic symbiotic relationship with photosynthetic, single-celled protists
    -produce oxygen/ food

5 True/False questions

  1. gestation-the time during which placental mammals develop inside uterus
    - mice 21 days, rhino 19 months, human 38 weeks


  2. diaphragm-live in colonies of polyps usually in warm waters
    -secrete calcium carbonate (limestone) around soft bodies for protection-may eventually build coral reefs (hard corals)


  3. placentalsmammals that carry young inside the uterus until development is almost complete


  4. phylum mollusca-some have external shells, others do not
    -bilateral symmetry
    -digestive tract with two openings
    -all have a mantle
    muscular foot or tentacles


  5. scyphozoa-the corals and anemones
    -exhibit only the polyp body form
    -sea anemones live individually and may live for 100s of years
    -some tropical anemones may have a diameter greater than 1m


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