The characteristic features of an invertibrate is given. "The phylum includes the comb jellies, also called walnuts. They are noted for their bio-luminescence and comb plates." Identify the phylum.

The following diagram shows the characteristics of a phylum. a) Identify the phylum. b) Label A in the diagram. c) Mention four salient features ofthe phylum.

Match the items in columns B and C with A. OR Features of different phyla/class are given below. Identify the phylum/ class and give examples of each group. a) Body is covered by scales, heart is three or four chambered. b) They are exclusively marine, commonly called sea walnuts and shows bioluminescence. c) Body is divided into proboscis, collar and trunk: They have open circulatory system and presence of proboscis gland.

During a seashore visit, a student collected two organisms. Observing the morphology, it is clearthat the organisms are radially symmetrical. One of them shows bioluminescene. a) To which phylum does this organism belong? b) Identify the possible phyla to which the other organism can be included. c) Which distinctive feature ofthis organism will help you to categorize it into a particular phylum?