What is the main role of setae in earthworm?

The human body is composed of how many cells?

Using earthworms to increase soil fertility is called __

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

Which of these is an external organ in male cockroach?

Which of these pairs of abdominal segments are a part of brood pouch of female cockroach?

Cutaneous respiration in frogs takes place by ___

Which of the following is not the correct location of a smooth muscle?