Question

Select the option that correctly matches a characteristics feature with the group of three animals.

• A. Excretion through Malpighian tubules - Limulus, Loligo, Locusta
• B. Parapodia help in swimmming - Neries, Pheretima, Hirudinaria
• C. Rasping organ called radula - Pila, Octopus, Sepia
• D. Comb plates for locomotion - Pleurobrachia, Pennatula, Ctenoplana

Answer 1

Answer: (C)

Rasping organ called radula - Pila, Octopus, Sepia

The phylum Mollusca animals have a file-like rasping organ called radula that helps in feeding.

(A) Malpighian tubules are the excretory organs present in terrestrial arthropods and are responsible for maintaining the ionic and osmotic balance. These tubules remove the waste from the hemolymph and the final excretion occurs in the rectum. Loligo is a mollusc.

(B) Parapodia help in swimming in aquatic annelids. Pheretima is not aquatic.

(C) In phylum Mollusca, Class Cephalopoda has a file-like structure called radula which helps in feeding. Pila, Octopus, Sepia have the radula.

(D) Phylum Ctenophora animals have eight rows of ciliated comb-plates that help in locomotion. Pennatula is a Cnidarian.

Hence, the correct answer is 'Rasping organ called radula- Pila, Octopus, Sepia'.