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5 Written questions

5 Matching questions

  1. Polyp
  2. phylum mollusca
  3. gestation
  4. coelum
  5. spiny anteater
  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 -the time during which placental mammals develop inside uterus
    - mice 21 days, rhino 19 months, human 38 weeks
  3. c a fluid-filled body cavity
  4. d -covered with sharp spines for defense
    -catches insects with a long, sticky tongue
  5. e tube-shaped body and a mouth surrounded by tentacles.
    -only stage in hydras, corals (always colonial), and anemones (singular)

5 Multiple choice questions

  1. -some have external shells, others do not
    -bilateral symmetry
    -digestive tract with two openings
    -all have a mantle
    -coelum
    muscular foot or tentacles
  2. umbrella-shaped body w/ tentacles hanging down
    -mobile
  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. keeps oxygenated blood seperate from deoxygenated blood--> provides good supply of O2
  5. -box jellies
    -square-shaped
    -have eyes
    -deadliest stinging organism on Earth= Sea Wasp

5 True/False questions

  1. nurse youngconducts nerve impulses from all parts of the body

          

  2. circulatory system-two or three-chambered heart
    -most have an open circulatory system(blood flows in open space); some, such as the octopus have a closed circulatory system(blood flows only in vessels)

          

  3. placenta-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

          

  4. Hydrozoa2 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. asexual reproduction-the time during which placental mammals develop inside uterus
    - mice 21 days, rhino 19 months, human 38 weeks

          

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