Bio1AL_Sum09_lab11_wksht - Chordate Diversity Worksheet Due...

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A67 – Summer 2009 Chordate Diversity Worksheet. Due at the end of lab. Name GSI & Sect # Station # This worksheet forms part of the basis for the questions that will appear on the lab practical exam. In addition you should know information provided by your GSI. Enjoy, but do not torment, the live animals. Think about the big picture and focus on how these animals survive and reproduce in their natural environments. You do not need to proceed in numerical order through the stations, although they are organized so that you can do so. Mammals and bird questions are towards the end of the worksheet, and are located in 2097 VSLB. You should look at the marine tank Urochordates (tunicate) -- make a drawing (on the left). Cephalochordates (Lancelet) -- make a drawing (on the right). FISHES (jawless fish: Myxini and Petromyzontida Jawed fishes: Chondrichthyes, Actinopterygii, Sarcopterygii [fishes are the non-tetrapod forms of Sarcopterygii) The study of fishes is known as ichthyology. STATION ONE: FISH DIVERSITY 1A. Which of the extant groups of fish possess jaws? 1B. What are two major difference between the sharks (Chondrichthyes) and the other jawed fishes (Actinopterygii and the non-tetrapod forms of Sarcopterygii)? Skeletal difference = Modification of the gastrointestinal tract = STATION TWO: SKELETAL SYSTEM 2. How do the vertebrae of terrestrial tetrapods differ from the vertebrae of fish? Look carefully at the interaction of one vertebra with the adjacent vertebra!
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A68 – Summer 2009 STATION THREE: FISH JAWS 3. How do the teeth of Chondrichthyes (SHARKS) differ from those of a ray-finned fish? Name a vertebrate group that lacks a jaw.
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Bio1AL_Sum09_lab11_wksht - Chordate Diversity Worksheet Due...

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