Which segments of the earthworm contain the stomach?

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

Which of the following is the main circulating fluid of the body?

Frogs are ___

Which of the following is not a part of the excretory system of frogs?

Which of the following does not pass through cloaca?

Select the correct order.

How many chitinous teeth are present in the gizzard of cockroaches?