Biology · STRUCTURAL ORGANISATION IN ANIMALS

Consider the following statements about the sensory organs in frogs: (A) Sensory papillae serve as organs of touch. (B) Nasal epithelium serves as an organ of smell. (C) External ear and pinna are well-developed for hearing on land. (D) The ear acts as an organ of hearing as well as balancing (equilibrium). How many of the above statements are correct?

1. Only one
2. Only two
3. Only three
4. All four