Draw your phylogeny on the back of this sheet. Cephal Ray- Taxa Mamm Reptiles Aves ochord finned Myxini alia Amphibia Chondrich Lobe- ns thyes finned fish ates fish Traits Hinged Jaw + + + + + + + Amniotic egg + + + Lobe-fins + + + + + Vertebral Column + + + + + + Scales + + Mammary Glands + Swim bladder/lung + + + + Tetrapodal Feathers + + + + + Dorsal Hollow Nerve + + + + + + + + + Chord Draw a phylogenetic tree for the Chordate Taxa listed above using the information provided. Include all the traits listed on the tree you draw at the correct place. The tree should also be as parsimonious as possible. You will be assessed on your understanding of phylogenies on the lecture exam, so if you have any questions, please talk with your lecture or your lab instructor. As you build your tree and add traits, make sure to: 1. Add an arrow indicating time 2. Draw a circle around the group of monophyletic taxa that make up the amniotes. 3. Find one additional trait (look one up) to add to your tree and place it on the phylogeny at the correct position.
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In this case, the most ancestral taxa are Myxini (hagfish) and Petromyzontida (lampreys). Show more…
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Complete the phylogenetic tree using the remaining data: Label each trait change on the tree (e.g. as shown for jaws and lungs). Submit your answer by uploading a jpg or pdf file to the worksheet question: You can take a well-lit photo of your answer drawn on blank paper or make a figure using drawing features in a program like PowerPoint or Word. TABLE 16.1 Eight Vertebrates and the Presence or Absence of Some Shared Derived Traits Derived trait Claws/nails Mammary glands Keratinous scales Taxon Jaws Lungs Gizzard Feathers Fur Lamprey (outgroup) Perch Salamander Lizard Crocodile Pigeon Mouse Chimpanzee Claws or nails Lizard Crocodile Pigeon Mouse Chimpanzee Lungs Jaws Salamander Perch Lamprey
Sri K.
Complete the phylogenetic tree using the remaining data. Label each trait change on the tree (e.g. as shown for jaws and lungs). Submit your answer by uploading a jpg or pdf file to the worksheet question. You can take a well-lit photo of your answer drawn on blank paper or make a figure using drawing features in a program like Powerpoint or Word.
Sulav P.
4. In the space below, redraw the phylogeny in Figure 11.5 so that the taxa are vertically listed in the order that the first member of that group (ex. the first tunicate, the first hagfish, etc.) appeared in the fossil record. Place the oldest taxa at the top of the tree and the most recent taxa at the bottom of the tree. In redrawing the phylogeny, make sure to maintain the relationships depicted in Figure 11.5 (Hint: node rotation). Add the synapomorphies to their corresponding branches in your newly drawn phylogeny. Biologically, are these trees different? Explain. The trees aren't biologically different because they contain the same information. Tunicate Hagfish Ray-finned fish Sharks + Rays Amphibians Mammals lizards Birds Crocodiles
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