The body wall of an earthworm is made up of how many muscle layers?
A. One
B. Three
C. Two
D. Five
Answer:C
The body wall of an earthworm is made up of how many muscle layers?
A. One B. Three C. Two D. Five
Explanation: The body wall of the earthworm is covered externally by a thin non–cellular cuticle below which is the epidermis, two muscle layers – circular and longitudinal and an innermost coelomic epithelium.