Q. Which of the these statements are wrong? I.Parapodia are lateral appendages in arthropods used for swimming. II.Radula in molluscs are structures involved in excretion. III.Aschelminthes are dioecious. IV.Echinoderm adults show radial symmetry. V.Ctenophorans are diploblastic.
A) I and II
B) I and III
C) I, IV and V
D) III and V
Explanation
Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming. In molluscs, the mouth contains a file-like rasping organ for fedding called, radula. Gills present in mantle cavity have respiratory and excretory functions.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.