Discussion:
Characters of echinoderms
1. List two characters of echinoderms that they do not share with other animal phyla.
2. Explain the multiregional hypothesis for the origin of humans, and list two lines of evidence to support it.
3. What are the differences between the gastrointestinal systems of a flatworm and an earthworm?
4. Using a Canadian example of an endangered or threatened organism, describe the problem the species faces, discuss whether any conservation efforts were made, and describe how successful they were.
Write your answer/response in detail with examples and facts and figures using APA style of formatting, size 12, font Times new roman and answer must be single spaced