Question

Ascidians are commonly known as

• A. Acoelomates
• B. Tunicates
• C. Denticulates
• D. None of the above

Answer 1

The correct option is B Tunicates

Ascidians are commonly called as tunicates. The Urochordata are known as tunicates. They are marine and invertebrate organisms. They are known as sea squirts. The body of an adult tunicate is quite simple. There is a swollen sac like body. There are two siphons through which the water enters and exits. Water is filtered inside the body. There are many tunicates which have a larva that is free-swimming. The larvae exhibits all the chordate characteristics. They possess a notochord. There is a dorsal nerve cord. There are pharyngeal slits and a post-anal tail. These are the advanced features which helps in swimming and searching for the food. This characteristics are lost in the adult due to retrograde metamorphosis.

Thus, the correct answer is option B.