TAKE-HOME ASSIGNMENT # 2 INVERTEBRATE ZOOLOGY FALL 1999
DR. W. CRONE (303 FTZ, 629-7439, cronewil@hvcc.edu)
Topic: SPONGES; CNIDARIANS; FLATWORMS; ROUNDWORMS
distributed Monday 9/20, due Tuesday 10/12 at lecture time
(you're always welcome to hand it in early, as late ones will not be accepted!)
Please answer these questions with typed, well-constructed sentences and/or paragraphs, or clear diagrams and/or illustrations. Please cite the source(s) for your answer if you are directly quoting or using ideas or language substantially from a source, e.g., (Hickman et al., p. _____), (Week 1 handout, p. _____). I will grade this assignment out of 20 points. Answers will be graded for accuracy, completeness, and grammar as well. Possible answers will be put on reserve at the library, Bio Study Center, and on my web site after the homeworks have been collected. Content from this assignment will be used for the second hour exam. I will be glad to go over rough drafts with you during office hours or appointments.
From Sir Arthur Conan Doyle, The Adventure of the Lion's Mane:
...His back was covered with dark red lines as though he had been terribly flogged by a thin wire scourge. The instrument with which this punishment had been inflicted was clearly flexible, for the long, angry weals curved round his shoulders and ribs. There was blood dripping down his chin, for he had bitten through his lower lip in the paroxysm of his agony. His drawn and distorted face told how terrible that agony had been...
In this adventure of Sherlock Holmes, a bather meets a gruesome fate after an encounter with Cyanea capillata (Fig. 18-14 indicates why it's often called the lion's mane).
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1. |
Help Sherlock Holmes solve the case. Describe the evidence in the above selection that indicates that the perpetrator was a member of Phylum Cnidaria. |
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2. |
What are major differences between the acoelomate (no body cavity) structure of the flatworms and the pseudocoelomate (false body cavity) structure of the roundworms? How do these account for differences in the structures of their digestive tracts? |
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3. |
Do sponges have sense organs? Why or why not? |
|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
Copyright 1999 by Wilson Crone
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This page updated on September 15, 1999