Which among the following phyla is exclusively marine?

Which of the following features is not a characteristic of $Protochordata$?

Classify the following organisms based on the absence $/$ presence of true coelom,i.e.,acoelomate,pseudocoelomate,and coelomate:
$(a)$ Scorpion
$(b)$ Sea anemone
$(c)$ Ascaris
$(d)$ Earthworm
$(e)$ Wuchereria
$(f)$ Nereis

$A$ plant specimen was found without differentiated roots.
$(a)$ Which plant structure helps in attaching this plant to the substratum?
$(b)$ To which group would you classify this plant?
$(c)$ Which plant could it be?

The locomotory organs of $Echinodermata$ are:

Match the items of Column $(A)$ with the items of Column $(B)$:

Column $(A)$	Column $(B)$
$(a)$ Pore bearing animals	$(A)$ Arthropoda
$(b)$ Diploblastic	$(B)$ Coelenterata
$(c)$ Metameric segmentation	$(C)$ Porifera
$(d)$ Jointed legs	$(D)$ Echinodermata
$(e)$ Soft bodied animals	$(E)$ Mollusca
$(f)$ Spiny skinned animals	$(F)$ Annelida