Balanoglossus is considered a connecting link between chordates and non-chordates as it shows both the characteristics of chordates and non-chordates.
Balanoglossus is similar to chordates as it shows the presence of notochord and pharyngeal gill slits (a characteristic feature of chordates).
They are similar to non-chordates as it shows the presence of a heart that is dorsal (like non-chordates).
Final Answer: Hence, it is concluded that Balanoglossus is connecting the link between non-chordates & chordates.
