a) Identify the invertebrate whose mouth is on ventral or lower side and anus is on dorsal or upper side.
b) Mention the phylum.
c) Comment on its General characters.

Characters of a marine invertebrate is given. - Spiny skinned body - Presence of water vascular system. a) Identify and write the phylum. b) Write any two functions ofwater vascular system among them.

Find the area of a triangle whose sides are a and b and the angle between those sides is C

Pick out the acoelomate organism from the following: i) Round worm ii) Hook worm iii) Filarial worm iV) Tapeworm b) Name the phylum to which it belongs. c) Mention its mode of nutrition. d) What is the coelomic condition of other organisms? Substantiatw your answer.

(## EXP_VAD_ZOO_XI_C09_E03_002_Q01 .png" width="80%"> a) Observe the diagram and identify the type of joint. b) Where can you find this type of joints in your body ? c) Comment on its ability to move.

Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect? a)Because of the large size of the Ln(III) ions, the bonding in its compounds is predominantly ionic in character. b)The ionic sizes of Ln (III) decrease in general with increasing atomic number. c)Ln(III) compounds are generally colourless. d)Ln(III) hydroxides are mainly basic in character..