Question

Connecting link between chordates and non-chordates is

• A. Balanoglossus
• B. Peripatus
• C. Tachyglossus
• D. Sphenodon

Answer 1

The correct option is A

Balanoglossus

The correct option is A.

Explanation for correct option:

1. Balanoglossus is the connecting link between chordates and non-chordates.
2. It consists of pharyngeal gill slits like chordates.
3. Notochordates are absent in adult Balanoglossus, which is a non-chordate feature.

Explanation for incorrect options:

Option B:

1. Peripatus is a connecting link between annelids and arthropods.

Option C:

1. Tachyglossus is a connecting link between mammals and reptiles.

Option D:

1. Sphenodon is a connecting link between reptiles and amphibians.

Final Answer: The connecting link between chordates and non-chordates is Balanoglossus.