Question

Larva of Leucosolenia is
A. Veliger
B. Auricularia
C. Parenchymula
D. Trochophore

Answer 1

Hint: Leucosolenia is a genus of calcareous sponges which belong to the family Leucosolenia. Species of this genus usually appear as groups of curved vases which are 2 cm long, each ending in an osculum. The shape of leucosolenia is like a tiny bunch of bananas.

Complete answer:
A veliger is a larva of planktonic kinds of sea snails and freshwater snails as well as bivalve mollusks, which are usually called clams and tusk shells. Veliger are the larva of bivalve, gastropod and scaphopod taxonomic class of organisms.
Auricularia is larva of fungi in genus jelly fungi which is present in the family Auriculariaceae. Their fruit body is resupinate or pileate, flabby elastic or tough gelatinous, wrinkled or veined and often purplish.
Parenchymula is larva of sponges and as Leucosolenia is a type of sponges so its larva is also called parenchymula. Leucosolenia reproduces both sexually and asexually. Mode of asexual reproduction are budding and sexual reproduction takes place with the help of gametes which are ova and sperms.
Trochophore is a type of free-swimming planktonic larva which are found in marine with several bands of cilia. They move their cilia rapidly and a water eddy is created which helps them to control the direction of their movement. This movement of cilia helps them to move their food closer in order to capture it easily.

Hence, the correct option is C. Parenchymula.

Note: Leucosolenia are mostly found in tide pools, clusters around the rocks and are of variety of colours usually pale. It is a hermaphrodite organism as it contains both the gametes in the body of the same individual. They were kept in the genus Leucosolenia by Bowerbank in 1861.