Multiple Choice (15 Points)




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Invertebrate Zoology Exam #2 15-November-2005


Be sure to read the directions for each section carefully.
Multiple Choice (15 Points): Circle the letter that corresponds to the correct answers. There may be no correct answers to a question, there may be one correct answer, or there may be more than one correct answer.



  1. The Rorifers have several advanced features – relative to many of the animals we have studied thus far. Which of these are features that rotifers possess?

    1. Complete Gut

    2. Blastocoelom (pseudocoelom)

    3. Modified Jaws

    4. Cephalization




  1. Which of the following phyla are blastocoelomates?

    1. Rotifera

    2. Platyhelminthes

    3. Cnidaria

    4. Nemata

    5. Nematomorpha

    6. Gastrotricha

    7. Kinorhyncha

    8. Priapula

    9. Entoprocta

    10. Loricifera

    11. Cycliophora




  1. The turbellarians have pharynxes of varying complexity. Which of the following pharynxes do not require eversion to extend out of the animals body?

    1. Simple Pharynx

    2. Bulbous Pharynx

    3. Plicate Pharynx

    4. Down East Pharynx




  1. The Cestoda have ____________________.

    1. A complete gut

    2. A blind gut

    3. No gut

    4. A complex gut



  1. The polychaeta have the following features.

    1. They are marine segmented worms

    2. They can have highly modified prostomiums

    3. They are highly caphalized

    4. They display radial symmetry




  1. Protonephridia in the flatworms are used for:

    1. Gas exchange

    2. Osmoregulation

    3. Locomotion

    4. Sexual reproduction




  1. The muscles in Nematodes are interesting for several reasons

    1. They have three layers

    2. There is only a single layer

    3. There are no connections to nerves

    4. Muscles “reach out” to neurons




  1. In the Sipunculans, there is a type of cell that circulates within the animal and essentially cleans up. This type of cell is known as the (pst pst – there is only ONE correct answer here)

    1. Vases

    2. Urns

    3. Pots

    4. Tuns




  1. The Echiurians use _____________________________ for respiration

    1. Inhalent canals

    2. Excurrent Canals

    3. Cloacal Irrigation

    4. Hemoglobin




  1. The sister groups to the Arthropods are the

    1. Metanephridia

    2. Tardigrada

    3. Annelida

    4. Sipuncula

    5. Onychophora




  1. The Arthropod cuticle can be divided into three sections – a top or ________________, a side or __________________, and a bottom or ______________________.

    1. Sternite, Pleurite, Tergite

    2. Pleurite, Sternite, Tergite

    3. Tergite, Pleurite, Sternite

    4. Tergite, Sternite, Pleurite

  2. Arthropods TYPICALLY have

    1. Centrolecithal eggs

    2. Telolecithal eggs

    3. Direct development

    4. Indirect development

    5. Internal fertilization

    6. External Fertilization

    7. Ecdysonal mediated Molding

    8. Shedding




  1. Hexapoda get around by

    1. Flying

    2. Pedestrian Locomotion

    3. Alternating Tripod Sequences

    4. An eversible pharynx




  1. Epithelial tissue is

    1. Free on one side

    2. Attached on both sides

    3. Attached to the cellar formation

    4. Attached to the basement membrane

    5. Irrelevant




  1. Which of the following are respiratory pigments

    1. Hemoglobin

    2. Hemoglobulin

    3. Pygidium

    4. Hemerythrin

    5. Hemocyanin

    6. Chlorocruorin

    7. Prostomium

    8. Nephridioglobin

    9. Immunoglobulin

    10. Lastmultiplechoicium



Fill in the Blanks (5 Points):


  1. Nematomorpha, or the horsehair worms, are found living happily in ________________________________________.




  1. The phylum Priapula is well named. It is named after the Greek God of ___________________________________________________.




  1. The Class Trematoda are commonly known as ___________________________.




  1. One common form of asexual reproduction used by the Platyhelminthes is ________________________________________________.




  1. The Oligochaetes have a specialized reproductive section called the ________________________.




  1. While the scientist was lounging in the Adirondacks, she came across a leach wanting to suck her blood. “_______________________________!!!” she cried in reference to the scientific name of the subclass the leach belonged to.




  1. A pattern of locomotion where the body undulates like a snake is known as ____________________________ locomotion.




  1. The segmentation or serial homology in annelids – particularly during development is known as ___________________________.




  1. The annelids use ___________________________________ to excrete wastes.




  1. A single unit in a compound eye is known as a(n) _____________________________________.


Definitions (24 Points): Define the following terms. It is sometimes useful to include diagrams with your definitions.


  1. Hypodermic impregnation



  1. Paedomorphic Characteristic



  1. Dioecious



  1. Cloaca



  1. Peristomium



  1. Pygidium




  1. Thigmotactic




  1. Basement Membrane



  1. Clitellum




  1. Statocyst




  1. Tegument




  1. Scolex


Short Answers (36 Points): Provide brief answers to the following questions. Diagrams may be useful.


  1. Describe two ways that rotifers move.



  1. What is developmental polymorphism – what is an animal that uses it and why?



  1. Describe the circulatory system in a sessile and errant Polychaete.



  1. Although blastocoelomates tend to look very different, they do share many characteristics. Describe three characteristics they share.




  1. Tradigrada are extremely tough little blighters. Part of their toughness is based on the fact that they have two dormant stages. Name to two stages and the appropriate term relating to a dramatically slowed metabolic rate and an un-measurable metabolic rate.



  1. Explain three reasons why segmentation is such an important evolutionary step.



  1. Describe the general path for urine formation in an animal that uses metanephridia. If you want, you can choose a specific animal.



  1. From the phylum Arthropoda, class malacostraca, pick three orders and briefly describe them.



  1. On this schematic drawing of a crustacean limb, label the segments.




Essay Questions (20 Points): Answer these questions providing as much detail as possible. Once again, diagrams may be useful to you.



  1. Crustaceans are an extremely successful group of invertebrates. There are many factors that make them successful – including flexibility in appendage construction and use, their ridged exoskeletons, their ability to quickly exploit a new environment…..

    1. On the diagram below label

      1. Segments

      2. Protective covering over segments

      3. Head appendages (there are three)

      4. Head/Trunk appendages (there are two here)

      5. Trunk appendages (five)

      6. Abdominal appendages (seven)

    2. Briefly explain three ways in which crustaceans get around (locomotion)

    3. Briefly describe the hormonal control of a molt cycle in a crustacean.

    4. Briefly describe the three stages that occur in indirect development

      1. How is their development similar or dissimilar to an annelids development?






  1. Both of our recent group discussion had a great deal to do with invertebrates overcoming obstacles in order to successfully reproduce. Based on these discussions:

    1. What are three problems that endoparasites face in terms of reproduction?

      1. Using examples from our discussion, how do they overcome each of these obstacles?

    2. Horseshoe crabs avoid predation by laying their eggs out of the water. This behavior creates the problem of needing eggs to hatch at the right time. List four cues that Limulus uses to trigger hatching.

      1. Describe why each of the cues is useful.

Invertebrate Zoology Exam #2 Fall 2005




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