Place the answers to the questions on the scantron. Do Not write on the test paper. Use the following to answer questions 17-20 .
Jointed legs are their main characteristic.
They contain nematocysts 19. Segmented worms 20. The anus first appeared in this group of organisms. Insects are separated from the crustaceans due to the number of body segments. C Base your answer to questions 29-30 on the diagram below .