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5 Written questions

5 Matching questions

  1. placentals
  2. food acquistion of mollusks
  3. cud-chewing
  4. phylum mollusca
  5. four-chambered heart
  1. a -most species are ocean dwellers; some lie in freshwater or moist terrestrial environments
    -some attach themselves to the ocean floor, others are free swimming
  2. b -cows, kangaroos etc
    -the portion of food that a ruminant returns from the first stomach to the mouth to chew a second time.
  3. c -may be predators, grazers, or filter feeders
    -radula
    -bivalves, such as clams, do not have radulas; they are filter feeders
  4. d keeps oxygenated blood seperate from deoxygenated blood--> provides good supply of O2
  5. e mammals that carry young inside the uterus until development is almost complete

5 Multiple choice questions

  1. -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"
  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. -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. sheet of muscle seperating expands and contrasts the chest cavity
  5. -has a rubbery snout, webbed front feet, sharp claws for digging & burrowing in soil

5 True/False questions

  1. molluskumbrella-shaped body w/ tentacles hanging down
    -mobile

          

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

          

  3. coralsa fluid-filled body cavity

          

  4. nervous systemnephridia- organs that remove metabolic wastes

          

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

          

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