To assist them to locate food, the bills of platypus have a class of sensory receptor previously thought to have occurred only in fish. This receptor is sensitive to
A) the earth's magnetic field.
B) mechanical stimulation from the water movement of prey.
C) the body heat of prey.
D) electrical signals generated when prey move.
E) pheromones released by prey.

Question

Quizplus · Accepted Answer

The bills of platypuses are equipped with electroreceptors, which are sensitive to the electrical signals generated by the muscular contractions of their prey. This unique adaptation allows them to detect prey while foraging underwater, even in murky conditions where visibility is low.

To Assist Them to Locate Food, the Bills of Platypus