Biology 100B Review #5 (Exam I)

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  1. What are the distinguishing features of sponges (Calcarea & Silica)?
    • -Lack true tissues,organs and symetry
    • -Spicules (skeletal elements)
    • -Hemaphrodites
  2. What are the distinguishing features of Cnidaria? Give an example of an animal from each of the 3 classes.
    • -Radial symmetry
    • -Gastrovascular cavity
    • -carnivores
    • -Cnidocytes: specialized stinging cells
    • Hydrozoa- hydroids
    • Scyphozoa-jellyfish
    • Anthozoa-corals
  3. Contrast animal body plans of Platyhelminthes, Nematoda, Annelida.
    • Platyhelminthes = acoelomates
    • Nematoda = psuedocoelomates
    • Annelida = coelomates
  4. What are the distinguishing features of Mollusca? Give an example of an animal from each of the 4 major classes
    • -Muscular foot
    • -Visceral mass
    • -Mantle

    Polyplocophora =Chitons

    Gastropoda = snail

    Bivalves = clams

    Cephalopods = octopus
  5. What are the distinguishing features of Echinodermata? Give an example of an animal from each of the 5 major classes.
    • -Endoskeleton of hard calcareous plates
    • -Secondary radial symmetry
    • - Water vascualr system with tube feet
  6. What are the distinguishing features of Arthropoda? What are the distinguishing features of the 4 major subphylum and give an example of an animal from each.
    • -Exoskeleton
    • - Jointed appendages
    • -Segmented coelomates

    Cheliceriforms:claw like feeding appendages (spiders,scorpions)

    Myriapoda: segmented with legs, each segment has two pairs of legs (Centipede)

    Crustacea: calcified exoskeleton, two pairs of antennae (lobster)

    Hexapoda: three pairs of legs, most with wings, have head, thorax,abdomen (grasshopper)
  7. Contrast complete and incomplete metamorphosis in Arthropoda.
    • I. Complete
    • - Pass through a larval stage, then enter an inactive state called pupa, or chrysalis, and finally emerge as adults. This process is called "complete" metamorphosis.

    • II. incomplete 
    • -Juvenile forms closely resemble adults', but are smaller and lack adult features such as wings and genitalia. This process is known as "partial" or "incomplete" metamorphosis
  8. What are the 3 subphylum of the Chordata? Give distinguishing characteristics of each.
    • - Urochordates(tunicates)
    • - Cephalochordates(lancelets)
    • - Vertebrates(with backbones)
  9. Note the major themes in derived characteristics within the living vertebrates (as in Fig. 23.36).
    -Anteriorskull with a large brain

    -Rigid internal skeleton supported by the -vertebral column

    -Internal organs suspended in a coelom

    -Well developed circulatory system with a ventral heart
  10. How did tetrapods likely evolve? What are the distinguishing characters of the major phylum of tetrapods?
    The fins of early aquatic sarcopterygians evolved into limbs & feet of tetrapods

    • - Fourlimbs & feetwith digits
    • - Ears for detectingairborne sounds
  11. How are birds adapted to flight? Why are birds considered reptiles?
    • - Feathers/wings
    • - Endothermic
    • - Hollow bones

    - Considered reptiles due them being amniotes and related to archosaurs.
  12. What is an amniotic egg?
    - A calcium based water impermeable shell that allows the embryo inside to develop in a contained aqueous environment. 

    - Stores food

    - Allows for passage of oxygen and carbon dioxide.

    -Slows evaporation of fluid inside.
  13. Describe the 3 types of mammals, noting distinguishing features.
    • -Prototherians
    • -Marsupials Therians
    • -Eutherians Therians
  14. Describe the main characteristics of primates.
    - Large brain

    - Short jaws

    - Forward looking eyes close together on face for depth perception

    - Well developed parental care & complex social behavior

    -Fully opposable thumb
Card Set:
Biology 100B Review #5 (Exam I)
2013-10-02 21:58:20
ccsf bio100B review

review 5
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