The epidermal pits in the middle of each segment of the earthworm contains _____

When a neuron is stimulated, the electrical signal travels along the ___

Which of the following animals is an invertebrate?

The body wall of an earthworm is made up of how many muscle layers?

What is the median mid dorsal line present along the length of an earthworm?

Where are the Malpighian tubules present in cockroach?

How many testes does Pheretima possess?

The compound eyes of cockroach are situated dorsally. True or False?