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5 Written questions

5 Matching questions

  1. nervous system
  2. therapsids
  3. uterus
  4. diaphragm
  5. Medusa
  1. a umbrella-shaped body w/ tentacles hanging down
  2. b -nerves and cerebral ganglia or a brain
    -most mollusks have paired eyes
  3. c hollow muscular-organ in which offspring develop
    -survival advantage
  4. d sheet of muscle seperating expands and contrasts the chest cavity
  5. e -reptiles with features of both reptiles & mammals
    -lower jaw & ear bones like reptiles
    -straight legs close to body like mammals
    -270-180 mya
    -Cenozoic Era: the "golden age of mammals"

5 Multiple choice questions

  1. -may occur in either polyp or medusa stage
    -polyps reproduce asexually in a process known as budding
  2. -most mollusks have gills-rich supply of blood/exchange of gases; land snails and slugs have primitive lungs
  3. -mammals that reproduce by laying eggs
    -nurse young after hatching
    -found only in Australia, Tasmania, and New Guinea
  4. -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)
  5. -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

5 True/False questions

  1. molluska fluid-filled body cavity


  2. respiration and circulation-mammals need a lot of energy for heating, cooling, & locomotion
    -thus, large amounts of O2 are needed
    -Four-chambered heart


  3. Polyptube-shaped body and a mouth surrounded by tentacles.
    -only stage in hydras, corals (always colonial), and anemones (singular)


  4. endothermic-able to maintain a constant body temp independent of their environment
    -temperature regulation: (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


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