Cutaneous respiration in frogs takes place by ___

Which of the following is an organ of hearing as well as balancing?

Which of these statements is true about the respiratory system of cockroach?

Cockroaches can transmit a variety of viral diseases.

Which of the following is not included in the mouthparts of the cockroaches?

Which of the following tissues is derived from all the three germinal layers?

Which of these is true about antennae of cockroaches?

The epidermis of earthworm is made of __