BIO 101 Module 3 Case

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**A+ Work! Use this paper as a guide to help you get a great grade!

Module 3 - Case


Case Assignment

From Sea Squirts to Otters...

For the Case Assignment in Module 3, you will compare the taxonomic classification of two organisms within the Phylum Chordata: the sea squirt and the sea otter. Use this site to accomplish your research:

University of California Museum of Paleontology, UC Berkeley

This link will bring you to the "Welcome to the Phylogeny Wing" page where you will begin your orientation to the website. Follow the links in each of the "four ways to get started" listed on this page. Use your back button to return to the "Welcome to the Phylogeny Wing" page each time. Read the content on the pages that numbers 1, 2, and 3 link to. Finally, complete your research on the taxonomic classification of sea squirts and sea otters using the link within step 4: Web Lift to Taxa. This is the same link as "tree of life" at the bottom of the page.

Within the Tree of Life/Taxon Lift, you will be able to find information about the classification of the sea squirt and the sea otter, two chordates. First select the appropriate Kingdom that the Phylum Chordata belongs to (you can refer back to our home page - remember, WE are chordates). You will access the rest of the necessary webpages from this list.

Case Assignment

For this Case Assignment, you are required to use the UCMP website and links accessed via this website ONLY. Using this resource write a 3-4 page paper on the taxonomic classification of sea squirts and otters that includes the following for each organism:

Part I: Sea Squirt

Once you find the "Chordata" link within the correct Kingdom page, notice the subphyla listed beneath it. Take note of which subphyla the sea squirt belongs to (you will see it in parentheses next to the correct name). Next click on the "Chordata" link and select "Systematics."

  1. List the Kingdom and Phylum, for the sea squirt and then briefly describe the characteristics that determine the organism's classification at each taxonomic level.

  2. Why is the sea squirt classified in the same phylum as a sea otter?

  3. Click on the "Life History & Ecology" tab to read more about Urochordates. What is another name that is used to describe them? Briefly describe the adult versus larval phase of its life cycle. decide, try each link until you find characteristics that match those of the sea otter.

  4. Once you have selected the correct Class, a list of Orders will open next to it. Consider the sea otter's diet. Does it eat vegetables such as sea weed, or meat such as oysters, mussels, and clams? Is it more like whale, horse, elephant, bat, or cat? If you can't decide try some of the links until you narrow it down.

  5. Select the corresponding Order and make note of it. Determine which Family, Genus and species describe the otter select "Systematics" at the bottom of the page.

  6. When you enter the "Systematics" page for the sea otter, select the link for "International Sea Otter Survival Fund" to learn more about the family and genus characteristics and classification. Use the links "About Otters" and then "Otter Species" from this page to answer the following questions:

To what family do otter-like animals belong?

Using the Species List, what is the difference between the Sea Otter and the Marine otter? List the genus and species for each.

What threats do the Sea Otter and Marine otter face as species?

Part III: Explore the UCMP Site

Follow two additional links within the UCMP website. This is your choice and your opportunity to explore this very cool resource provided by UC Berkeley. The links within UCMP do not have to be related to either sea squirts or otters, but you must include the web address (and it must be within the domain!) and a brief description of what you learned on that page.

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