question_answer 28)

  Match the column I with column II and choose the correct option.

Column I		Column II
A.	Porifera	1. Canal system
B.	Aschelminthes	2. Water vascular system
C.	Annelida	3. Muscular Pharynx
D.	Arthropoda	4. Jointed appendages
E.	Echinodermata	5. Metameres

Codes A    B     C     D      E (a)          2    3     5     4       1 (b)          2    5     3     4       1 (c)           1    3     5     4       2 (d)          1    5     3     4       2

Answer:

                  (c) The body of porifera (sponges) is organized in such a way, so that they form a complex system of pores and canals called canal system. This system helps in regulating the flow of water within them e.g., Sycon. Aschelminthes possess jointed appendages e.g.; Ascaris. Annelidans possess metameric, segmentation in body e.g., earthworm. Arthropodans   possess jointed appendages in each segment of their body e.g., cockrach. Eehinoderms possess water vascular system or ambulacral system e.g., Asterias or starfish.