The statement that 'all chordates are metamerically segmented' is:

Which of the following is a characteristic of chordates that is $NOT$ found in non-chordates?

In chordates,the alimentary canal is located in which position relative to the nerve cord?

Give three major differences between chordates and non-chordates and draw a schematic sketch of a chordate showing those features.

Which of the following is present during some stage of the life cycle in animals belonging to the phylum $Chordata$?

Which of the following statements is/are correct for the phylum Chordata?
$(a)$ In Cephalochordata,the notochord extends from head to tail region and is persistent throughout their life.
$(b)$ In Vertebrata,the notochord is present only during the embryonic period.
$(c)$ The central nervous system is dorsal and hollow.
$(d)$ Chordata is divided into $3$ subphyla: Hemichordata,Urochordata,and Cephalochordata.