11. Corals have a skeleton composed of ..........
Match the item in column I with column II and choose the option showing correctlymatchedpairs
I II
(p)porifera (i)spongila
(q)Cnidaria (ii)liver fluke
(r)platyhelminthes (iii)Neris
(s)Annelida (iv)Adamsia
A. p - (iv), q - (ii), r - (i), s - (iii)
B. p - (i), q - (iv), r - (ii), s - (iii)
C. p - (i), q - (iv), r - (iii), s - (ii)
D. p - (iv), q - (ii), r - (iii), s - (i)
Answer : Option B
13. Cnidoblasts are used for .........
14. Gastro-vascular cavity is located in........
Identify the animal shown in diagram
16. The body bears ________ external rods of ciliated comb plates in pleurobrachia
17. Ctenophores commonly known as ________
18. The excretory cells, that are found in platyhelminthes are _______
19. Function of suckers cell in liverflulke
20. Ascaris is found in