Use the following information to answer the question.While on an intersession course in tropical ecology, Kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit). The 1-meter-long organism has smooth skin, which appears to be segmented. It has two tiny eyes that are hard to see because they seem to be covered by skin. Kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. Kris says that it is a giant oligochaete worm; Shaun suggests it is a legless amphibian; Kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow).The class decided to humanely euthanize the organism and subsequently dissect it. Having decided that it was probably not a reptile, two of their original hypotheses regarding its identity remained. Which of the following, if observed, should help them arrive at a conclusive answer?

What type of symmetry do larval vs. adult echinoderms have?

At one time, birds held the same taxonomic rank as Reptilia and Mammalia. Now, however, they are considered as part of the reptile clade. Without this change, ________.

Slide 9: What is the best title for this slide?

You are a chordate, yet you lack most of the main derived characters of chordates. Explain

Slide #1: Which of the following terms would be the best title for this slide?

Slide 14: Which of the three regions indicated on the image are part of the water vascular system?

Slide 11: Match each term with the correct region of the image

Describe how the water vascular system works and what it is used for.

Don’t forget to submit your revised evolution story to last week’s evolution story discussion.