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

All of the following are characteristics of urochordates,except:

Which of the following is a group of invertebrate chordates?

All chordates possess $..........$.

Select the correct statements with reference to chordates.
$A$. Presence of a mid-dorsal,solid and double nerve cord.
$B$. Presence of closed circulatory system.
$C$. Presence of paired pharyngeal gill slits.
$D$. Presence of dorsal heart.
$E$. Triploblastic pseudocoelomate animals.
Choose the correct answer from the options given below:

Which of the following statements is true?