Class Cestoda is characterised by:

Hexacanth larva is formed in:

Which of the following is a platyhelminth?

Coelenterates generally include the animals which are:

Coelenterates are:

Which coelenterate furnishes a good example of commensalism?

More or less ring shaped circular or horse-shoe shaped coral reef partly or wholly enclosing a central lagoon is called:

Polystomatous conditions is found in:

Medusoid stage is altogether absent in class:

The following classes, orders are synonyms to each other, which one is incorrect?

Coelenterates can be identified from other animals in having:

The development of coelenterates exhibit ___________ larva:

Which of the following is not a coelenterate?

The generic name of "brain-coral" is:

Polymorphism is exhibited by:

Hydra belongs to coelenterata since it has:

Which of the following is characterized by the presence of an enormous float?

Sea anemone belongs to the class:

Which of the following is commonly known as the mushroom coral?

Medusoid phase is altogether absent in:

Majority of corals belongs to the class:

Polymorphism is an important feature in:

The body organisation of coelenterates is at the:

The simplest of sponges is:

Which one of the following statements is correct?