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5 Written questions

5 Matching questions

  1. bivalves
  2. Hydrozoa
  3. radula
  4. Medusa
  5. excretory system
  1. a 2 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
  2. b nephridia- organs that remove metabolic wastes
  3. c umbrella-shaped body w/ tentacles hanging down
  4. d -two-shelled mollusks
    -includes clams, oysters, scallops
    -most are marine, some live in freshwater
    -filter feeders*
    -no radula. only muscular feet.
  5. e tongue-like organ with rows of teeth that is used to drill, scrape, grate or cut food
    (ex) snails, octopuses

5 Multiple choice questions

  1. -nerves and cerebral ganglia or a brain
    -most mollusks have paired eyes
  2. -mammals in which young have short period of development within uterus, followed by a second period of development within a pouch on outside of mother's body
    -mostly in Australia
  3. a fluid-filled body cavity
  4. -has a rubbery snout, webbed front feet, sharp claws for digging & burrowing in soil
  5. -most species are ocean dwellers; some lie in freshwater or moist terrestrial environments
    -some attach themselves to the ocean floor, others are free swimming

5 True/False questions

  1. sexual reproduction in cnidarians-may occur in either polyp or medusa stage
    -polyps reproduce asexually in a process known as budding


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


  3. placentalsmammals that carry young inside the uterus until development is almost complete


  4. nerve netconducts nerve impulses from all parts of the body


  5. gestation-the time during which placental mammals develop inside uterus
    - mice 21 days, rhino 19 months, human 38 weeks