Q. Select the correct statement from the ones given below with respect to Periplaneta americana
A) Grinding of food is carried out only by the mouth parts
B) Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives
C) Males bear a pair of short thread like anal styles
D) There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut
Explanation
[Solution from source] Male cockroaches bear a pair of short, thread-like anal styles, which females lack. The nerve cord is ventral, food is also ground in the gizzard, and there are about 100–150 thin Malpighian tubules, not 16. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.