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5 Written Questions

5 Matching Questions

  1. sexual reproduction in cnidarians
  2. therapsids
  3. Medusa
  4. gastropods
  5. nervous system
  1. a -stomach-footed
    -most have a single shell (snails, conches, whelks, periwinkles, etc); slugs(protected by mucus) and nudibranchs(bright-colored) do not
    -shelled gastropods nay be herbivores, predators, or parasites
    -nudibranchs that feed on jellyfish incorporate the poisonous nematocysts into their own tissues
  2. b -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"
  3. c umbrella-shaped body w/ tentacles hanging down
  4. d occurs only in one phase of the life cycle, usually the medusa stage (unless there is no medusa stage)
  5. e -nerves and cerebral ganglia or a brain
    -most mollusks have paired eyes

5 Multiple Choice Questions

  1. tongue-like organ with rows of teeth that is used to drill, scrape, grate or cut food
    (ex) snails, octopuses
  2. -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. -the time during which placental mammals develop inside uterus
    - mice 21 days, rhino 19 months, human 38 weeks
  4. -mammals that reproduce by laying eggs
    -nurse young after hatching
    -found only in Australia, Tasmania, and New Guinea
  5. -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

5 True/False Questions

  1. diaphragmsheet of muscle seperating expands and contrasts the chest cavity


  2. platypus-has a rubbery snout, webbed front feet, sharp claws for digging & burrowing in soil


  3. reproduction 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


  4. zooxanthellae-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


  5. four-chambered heartconducts nerve impulses from all parts of the body


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