Question

Hemichordates are not regarded as true chordates, because:

• A. They are triploblastic.
• B. They do not possess a true notochord.
• C. They are bilaterally symmetrical.
• D. Both B and C
  

Answer 1

Answer: (D)

Both B and C

Hemichordates share some but not all of the typical chordate characteristics and hence, are not true chordates.
Hemichordates do not possess a true notochord (presence of true notochord is a characteristic feature of chordates). Hence, they come under non-chordates.

So, the correct answer is option D.