The larva of $Balanoglossus$ is known as:

The body is divided into proboscis,collar,and trunk. This is a characteristic feature of which of the following?

The phylum which was earlier considered as a sub-phylum under $Chordata$ but now placed as a separate phylum in non-chordates is:

Important characteristic that hemichordates share with chordates is

In which of the following groups are the members exclusively marine?

Proboscis gland is a/an