Problem:
Question 1: Explain why sea lilies (stalked crinoids) were formally classified as plants?
Question 2: How do tube feet differ among the different classes of Echinoderms? How do these reflect different functions?
Question 3: How does segmentation in amphioxus differ from that in an annelid or arthropod?
Question 4: Given that toadfishes and batfishes are not closely related, what features about them would you describe as convergent?
Could someone help to explain the answer of these questions.