Question

Parents of ammocoete larva show _______________.

• A. Paired fins
• B. Placoid scales
• C. Catadromous migraton
• D. Anadromous migration

Answer 1

The correct option is D Anadromous migration

D. Anadromous migration

Reason: Petromyzon or sea lampreys are the organisms which belong to the class cyclostomata under the superclass Agnatha. Those are the most primitive vertebrates alive in this world. They are anadromous in nature which means that they travel to fresh water for laying their eggs. After metamorphism, ammocoete larvae are observed which resembles the structure of hemichordate Amphioxus. So the correct option is D.