Select the correct option for the animal given below.

Differentiate between Non-Chordata and Chordata.

Which of the following groups of characters is present in all chordates at some stage in their life?

Which one of the following is not a characteristic feature of all the chordates?

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.

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