Question

The nerve cord of cockroach is

• A. Double, ventral and solid
• B. Double dorsal and hollow
• C. Single, dorsal and solid
• D. Single, ventral and hollow

Answer 1

Answer: (A)

Double, ventral and solid

The nerve cord makes up the nervous system of some phyla of invertebrates, particularly annelids and arthropods. It consists of cerebral ganglia with nerve cords running down the ventral plane of the organism. Double ganglionated ventral nerve cords from anterior to posterior end are made up of segmented ganglia that are connected by a tract of nerve fibres passing from one side to the other of the nerve cord and so, is solid.
Therefore, the correct answer is option A.