Which group of animals have three pairs of legs, a tympanum for reception of sound waves, and Malpighian tubules for excretion?

Question

Quizplus · Accepted Answer

Grasshoppers have three pairs of legs, a tympanum (eardrum) for reception of sound waves, and Malpighian tubules for excretion. Starfish and lancelets have neither of these characteristics, while crayfish have five pairs of legs and use gills for excretion. Earthworms have no legs and excrete through a pair of nephridia.

Which Group of Animals Have Three Pairs of Legs, a Tympanum