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TAKE-HOME ASSIGNMENT # 1 INVERTEBRATE ZOOLOGY FALL 1999 DR. CRONE

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

Topics: Introduction to Zoology and Classification; Ecology; Cells

distributed Monday 8/30, due Tuesday 9/14 at lecture time

(you're always welcome to hand it in early!)

Please answer these questions with typed (not hand-written), 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). I will grade this assignment out of 20 points. Answers will be graded for accuracy, completeness, grammar, and amount of support you give your conclusions. Possible answers will be put on reserve at the library, the Biology Study Center, and my website after the homeworks have been collected. Content from this assignment will be used for the first hour exam. I will be glad to go over rough drafts with you during office hours or appointments.

example: Which of the Linnean taxa (levels) of classification is the most"real?" Why can we say that?

possible answer: The taxon of"species" is potentially the most biologically"real." In addition to being the most narrowly defined of taxonomic levels,"species" may also designate populations of organisms that are potentially interbreedable, but with mechanisms that prevent interbreeding or the formation of viable offspring with other populations. For example, horses and donkeys are distinct species, but the offspring of a horse and donkey, a mule, is sterile (Week 1 class notes; Hickman et al., pp. 350-351).

GOOD LUCK! Have fun--I am looking for your supported thoughts.

  1. Would you expect to find radially symmetrical animals on land? Why or why not?
  2. The human population of the world has quadrupled during this century (from 1.5 to 6 billion). What effect(s) might this have on the population sizes (increase, decrease, no or little effect) of the following invertebrates? Be sure to support your answers:
  1. cockroach
  2. American lobster
  3. deep-sea tube worm
  1. What are the functions of cilia and flagella? Primary ciliary dyskinesia is a rare disease where cilia and flagella do not function well--predict one problem such a patient would exhibit and explain why.

|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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This page updated on September 15, 1999