ANIMAL STRUCTURE

 

SPRING 2001

 

HOUR TEST II

 

BIOLOGY 226

 

MEHAFFEY

 

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1.      (20 points)Compare and Contrast: In the following, complete the sentences:

 

  1. Ocelli and ommatidia are both:

     

     

    but they differ in that:

     

     

     

     

    1. Malpighian tubules and metanephridia are both:

     

     

     

    but they differ in that:

     

     

     

    1. Book lungs and insect tracheae are both:

     

     

     

    but they differ in that:

     

     

     

    1. The prostomium and pygidium are both:

     

     

     

    but they differ in that:

     

     

     

    1. Tagmosis and heteronomy both refer to:

     

     

     

    but they are different in that:

     

     

    2.      (4 points) What is torsion in snails? What does it accomplish for the snail?

     

     

     

     

     

     

    3.      (4 points) Where would you look for the madreporite in a brittle star? In a sea cucumber?

     

     

     

     

     

     

    4.      (24 points) Fill in the following table:

     

    COMMON NAME

    PHYLUM

    CLASS

    By the Wind Sailor

     

     

    liver fluke

     

     

    jellyfish (large)

     

     

    cockroach

     

     

    lobster

     

     

    butterfly

     

     

    clam

     

     

    sea urchin

     

     

    barnacle

     

     

    slug

     

     

    tapeworm

     

     

    earthworm

     

     

     

     

     

    5.      (5 points) What are the three coelomic divisions in deuterostomes? What structures arise from each in the ectoprocts and phoronids?

     

     

     

     

     

     

     

     

    6.      (6 points) What are three consequences that the arthropod exoskeleton has for arthropod anatomy and physiology?

     

     

     

     

     

     

     

     

     

     

     

    7.      (3 points) How is the internal architecture of polychaetes and oligochaetes reflected in their modes of locomotion?

     

     

     

     

     

    8.      (6 points) Give an example of a mollusk belonging to each of the following divisions:

     

    a.      Gastropoda: Prosobranchia:

     

    b.      Gastropoda: Ophisthobranchia:

     

    c.      Cepalopoda:

     

    9.      (14 points) Fill in the following table:

     

    Structure
    Phylum
    Function

    polian vesicle

     

     

    crystalline style

     

     

    parapodia

     

     

    chloragogue cells

     

     

    epitoke

     

     

    ommatidium

     

     

    Aristotle’s lantern

     

     

     

     

     

     

     

     

     

    10. (2 points) Why did we group pogonophorans with annelids?

     

     

     

     

     

     

     

     

    11. (4 points) Where would you find the coelom in a leech? In a snail?

     

     

     

     

     

     

     

     

    12. (5 points) What does the water vascular system do in echinoderms?

     

     

     

     

     

     

     

     

    13. (3 points) Why did researchers think for many years that pedicellaria were a symbiont on the surface of echinoderms?