How to write a formal lab report - Download as DOC by nRm1x27


									                         How to write a formal lab report – Worm Dissection

I. TITLE: Pick a descriptive title that is related to your investigation/research.

Purpose of the lab should be included after the title.

II. INTRODUCTION: (Background information)
        a. Describe the various body systems found in an earthworm - Circulatory, excretory, digestive and
        reproductive. Make sure to include the following words in your description: clitellum, crop, gizzard,
        pharynx, heart, nephridia, dorsal blood vessel
        b. Include its scientific classification – (Kingdom= Animalia, Phylum- Annelida, Class:
        Oligochaeta, Family: Lumbricidae, Genus: Lumbricus, Species: terrestris
        c. Include the importance of earthworms in the ecosystem.

a. List materials.
b. Clearly state step by step how you run your experiment. Avoid using "I" or "we" Do not copy and paste
from my handout. Summarize it but include enough information so that someone else can replicate it.

Attach the “practical assessment” to this part of the report which was given to you on the day of dissection.

a. Post Lab Questions (Answers are in Ch29 pg 744 – Comparing Invertebrates)
       1. Compare and contrast the first multicellular animals with the earthworm.
       2. How was the annelid Canadia--of the early Cambrian Period-- similar to today’s annelids?
       3. Looking at the phylogenetic relationship diagram on pg. 747, list the five major features that
           mollusks and annelids share in common
       4. How is the digestion in sponges different from the digestion that takes place in annelids and
       5. How is the specialization of the digestive tract (ex. One-way digestive tract) a benefit to an
           animal such as the earthworm?
       6. Compare the open and close circulatory system of an insect vs. an annelid.
       7. Compare the excretory system of a flatworm and an annelid.
       8. Response: How is a complex nervous system beneficial to an animal? Give example.
       9. Movement: What kind of skeletal system does annelids and certain cnidarians have? How
           does it work?
       10. Reproduction: What is the advantage of asexual reproduction? Of sexual reproduction?

b. Validity & Error Analysis
- Comments on the accuracy of the identification of the internal and external anatomy. In other words,
how much confidence do you have that you were able to identify the organs inside your specimen?
- Discuss possible errors that could have occurred in the collection of the data (experimental errors)

c. Discuss Improvements:
- How can the experiment be improved if you were to do it again? Be specific.

DUE DATE: ____________________________

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