Question

Hatschek's nephridium is present in

• A. Herdmania
• B. Amphioxus
• C. Both of the above
• D. All of the above

Answer 1

Answer: (B)

Amphioxus

The unpaired 'Hatscheck's nephridium' is the largest and most anterior of the nephridia in the body of the Branchiostoma. It is a single tubule which lies on the left side of the notochord running parallel to the left anterior aorta. It stretches from the anterior vestibule to a point immediately posterior to the velum where it opens into the endodermal pharynx.

So, the correct answer is option B.