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5 Written questions

5 Matching questions

  1. diaphragm
  2. food acquistion of mollusks
  3. phylum mollusca
  4. coelum
  5. sexual reproduction in cnidarians
  1. a occurs only in one phase of the life cycle, usually the medusa stage (unless there is no medusa stage)
  2. b -most species are ocean dwellers; some lie in freshwater or moist terrestrial environments
    -some attach themselves to the ocean floor, others are free swimming
  3. c a fluid-filled body cavity
  4. d -may be predators, grazers, or filter feeders
    -bivalves, such as clams, do not have radulas; they are filter feeders
  5. e sheet of muscle seperating expands and contrasts the chest cavity

5 Multiple choice questions

  1. -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)
  2. nephridia- organs that remove metabolic wastes
  3. a mutualistic symbiotic relationship with photosynthetic, single-celled protists
    -produce oxygen/ food
  4. -two-shelled mollusks
    -includes clams, oysters, scallops
    -most are marine, some live in freshwater
    -filter feeders*
    -no radula. only muscular feet.
  5. ->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 True/False questions

  1. spiny anteater-covered with sharp spines for defense
    -catches insects with a long, sticky tongue


  2. respiration and circulation-most mollusks have gills-rich supply of blood/exchange of gases; land snails and slugs have primitive lungs


  3. anthozoa2 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


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


  5. mantletongue-like organ with rows of teeth that is used to drill, scrape, grate or cut food
    (ex) snails, octopuses