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Dr. W. Crone (303 FTZ, 629-7439, cronewil@hvcc, http://www.hvcc.edu/academ/faculty/crone/index.html)

Tuesday, October 19, 8:45 A.M. (week 8): this will be your last grade before midterms

Bring sharpened #2 pencils (I won't have them on me!)

This will cover materials covered in lecture for weeks 4-7.

Week 4:

sponges and multicelluarity

Week 5:

cnidarians and ctenophores

Week 6:

platyhelminths and pseudocoelomates

Week 7:

overview of parasites


35 multiple choice questions, 2 points each

70 points

2 essays taken from the choices below, 15 points each

30 points


100 points


I would recommend that you are comfortable with your lecture notes, lecture handouts, and the additional topics covered by homework assignment # 2. You may find the textbook particularly useful in preparing your thoughts for the mini essays below.

Mini essay topics for the exam. You are welcome to think about these topics and prepare ahead of time, but you will not be allowed to bring any notes or prewritten essays into the exam. You will be asked to write on TWO of these on the exam (the other mini essay topic will be covered by multiple choice questions).



Body structure and surface area. Describe the differences in overall body structure among sponges, cnidarians, and flatworms in how they address concerns over surface area, e.g., for digestion.


Body structure and parasitism. Describe at least three features of the roundworms (nematodes) that make them effective parasites.


Body structure and movement. Describe the differences in movement among cnidarians, ctenophores, rotifers, and nematodes. What are key structural features that allow them to move in the way that they do?


Here are a number of multiple choice questions from a previous year's tests. Although the emphasis may be different from this year's, it should give you a flavor of the multiple choice questions I may ask. The correct answer is listed on the bottom of the next page. As you have experienced, my general approach to multiple-choice questions is to have them cover the lecture material, but in a way that makes you think.


1. Bath sponges (those real sponges used around the house) have their support made of:

A. silica spicules

B. a protein called spongin

C. calcium carbonate, like corals

D. hydrostatic skeletons only


2. Which of the following cnidarians would have the most powerful sting?

A. individual coral polyp

B. (plankton-eating) moon jellyfish, Aurelia

C. sea wasp, Chironex

D. individual feeding polyp of Obelia colony


3. The cnidarian nervous system is best described as:

A. highly specialized

B. a nerve net

C. a ladder-type nervous system

D. with both central nervous system and a peripheral nervous system components


4. Members of Phyla Cnidaria and Ctenophora eat:

A. almost always meat.

B. almost always plants.

C. a very balanced diet of both plants and animals.


5. Coral reefs consist of:

A. many millions of calcium carbonate-secreting polyps

B. many millions of mating medusae

C. many millions of protein (keratin)-secreting polyps

D. many millions of polyps that prefer to live in cold, dark waters


6. Flame cells are part of a flatworm's system of:

A. thermoregulation

B. osmoregulation

C. circulation

D. digestion

E. defense


7. The _____ are so highly adapted to parasitism that they don't even have an intestine of their own.

A. planarians

B. blood flukes

C. tapeworms

D. Chinese liver flukes

E. sheep flukes


8. In which of the following is most of the fluid of a nematode or rotifer found?

A. intestine

B. pseudocoel

C. gonad

D. body wall



Answers: 1-B, 2-C, 3-B, 4-A, 5-A, 6-B, 7-C, 8-B


|main page| |background| |03028: Physiology| |03048: Anatomy|

|03050: Invertebrate Zoology| |03051: Vertebrate Zoology| |03074: Economic Botany|


Please send comments and questions to: cronewil@hvcc.edu


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Copyright 1999 by Wilson Crone

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This page updated on October 8, 1999