Given below are the pair of phyla with their body cavities.
`{:(,"Phylum","Body cavity"),(I., "Platyhelminthes",-"Pseudocoel"),(II.,"Annelida",-"Schizocoel"),(III,"Nematoda",-"No body cavity"),(IV.,"Echinodermata ",-"Enterocoel"):}`
Choose the option with the correct codes

Annelida have a true body cavity.

Match the species in Column I with their respective feature of body organisation in Column II {:("Column I","Column II"),("P. Mollusca","i. Pseudocoelom"),("Q. Annelida","ii. Radula"),("R. Nematoda","iii. Radial symmetry"),("S. Echinodermata","iv. Segmentation"):} Choose the CORRECT combination.

Given below is a typical sponge body . Identify i, ii, iii

Sedentary filter feeding molluscs are I.oyster " " II.pecten III.mussels " " IV. Chaetoderma Choose the option with correct codes .

Name those phyla in which circulatory system is open and body cavity is filled with blood.

Select the correct matching of animal , its symmetry and type of body cavity .

Select the correct matching of animal , its symmetry and type of body cavity .

Why is the body cavity of the roundworm called a pseudocoel?