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5 Written questions

5 Matching questions

  1. mollusk
  2. reproduction of mollusks
  3. spiny anteater
  4. scyphozoa
  5. sexual reproduction in cnidarians
  1. a -covered with sharp spines for defense
    -catches insects with a long, sticky tongue
  2. b -some have external shells, others do not
    -bilateral symmetry
    -digestive tract with two openings
    -all have a mantle
    muscular foot or tentacles
  3. c occurs only in one phase of the life cycle, usually the medusa stage (unless there is no medusa stage)
  4. d -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
  5. e -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 Multiple choice questions

  1. ->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
  2. -two-shelled mollusks
    -includes clams, oysters, scallops
    -most are marine, some live in freshwater
    -filter feeders*
    -no radula. only muscular feet.
  3. -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. hollow muscular-organ in which offspring develop
    -survival advantage
  5. mammals that carry young inside the uterus until development is almost complete

5 True/False questions

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


  2. radulaumbrella-shaped body w/ tentacles hanging down


  3. mantle-a thin membrane surrounding the internal organs that secretes the shell


  4. zooxanthellaea mutualistic symbiotic relationship with photosynthetic, single-celled protists
    -produce oxygen/ food


  5. 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)


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