Biloluminiscence is shown by

Which phylum of animalia has exclusively marine animals?

Which of the following animals is called ' Portuguese man of war'?

'Systema naturae' was written by

Filariasis is transmitted by

Which of the following phyla possesses radula apparatus?

Which of the following is a limbless amphibian?

The phylum in which larva shows bilateral symmetry and adult shows radial symmetry is

Which of the following organisms shows bioluminiscence?

Which of the following is a hemichordate?

Which of the following is acoelomate?

Brain coral is

Which of the following larva shows nocturnal periodicity?

Which of the following is a jawless vertebrate?

Which of the following is sexual phase in the life cycle of Obelia?

Which of the following is a hemichordate?

Which of the following phyla has branched alimentary canal without anus?

Tree frog is also known as

Devil fish belongs to phylum

Retrogressive metamorphosis is shown by