BIO4

Select two types of hemichordates and two types of nonvertebrate chordates, and then complete the matrix by filling in the columns for each type.

Answer following questions in at least 150 words

1.     Compare and contrast two groups--class or subclass--of echinoderms. How are they similar? How are they different? Provide examples to support your answer.

2.   Three groups of lophophorates are closely related, but one group is slightly different. What are the characteristics of these different groups that prohibit them from being classified as one group instead of four separate groups? Provide evidence to support your answer.

3.. How does the anus placement differentiation show that the differing species have different daily ecosystem activities?

4. What are the main contributions of the "strange worm" to its ecosystem?

5.There has been a change in taxonomy with the group of animals known as the xenoturbellids. What is the life history of xenoturbellids? What are the reasons behind this change?

6.What do the biologists who wish to make changes in an organism's classification have to "do" and who do they petition to?

7.Do you feel your experiences could be limited with this phylum of invertebrates?