During a field trip Raju has some organisms with the following characters. Help him to identify the phyla of those organisms.
a) Metameically segmented body.
b) Body covered with calcareous shell.
c) Dorso-ventrally flattened leaf like body.
d) Body divided into head, thorax and abdomen.

During the field trip a group of students collected some organisms with following characters. Help them to identify the phyla of those organisms. a) Dorsoventrally flattened and leaf like body. b) Jelly tike body with eight ciliated combplates. c) Body covered with calcareous shell. d) Spiny skinned body with radial symmetry.

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.

Mention a single word for the following. a) Sexes are not separate. b) Body wall with three layers. c) File like rasping organs in Mollusca. d) Segmentation of animal body. e) The property of a living organism to emit light. f) Alternation of generation in Cnidarians.