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1. What is the genetic link between Amphioxus and humans?
2. What is the significance that all species described in these films (Amphioxus, sharks, and humans) belong to the same Phylum?
3. What is the significance that sharks have the same three brain regions as humans? What is the explanation for that?
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- 1. Based on the activity what is the basis for saying that a certain organisms is less or more similar to another organism. 2. In the introduction it says "molecular data is universal", what is meant by this and why is it important in the science of systematics? 3. Figure 2 shows the phylogenetic relationship among chordates. Based on the figure, how does the ancestor of all chordates look like? 4. Based on figure 2 which organisms is most similar to Tunicates and least similar to tunicates?1.The Order Squamata consists of 3 sub orders.Why are these Suborders so different-give at least 2 distinctive characteristics of each. 2.Why are Tuataras not grouped together with lizards?what is the morphological character that separates them? 3.How the reptile eggs differ from amphibian eggs?Why is this important?4. Compare the overall body structure of the cave fish and the minnow below. cave fish minrow P. * a. What is the biggest, most obvious difference between the body structure of these two fish? b. Assume the two fish came from the same original ancestor. Why might the cave fish have evolved without eyesight? c. What kind of sensory adaptation would you hypothesize the cave fish has to allow it to navigate in a cave, including catching and eating food?
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