NEETZoologyStructural Organisation in Animals
Select the correct statement from the ones given below with respect to Periplaneta americana
Options
- AGrinding of food is carried out only by the mouth parts
- BNervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal con
- CMales bear a pair of short thread like anal styles
- DThere are 16 very long Malpighian tubules present at the junctions of midgut and hindgut
Correct answer
C. Males bear a pair of short thread like anal styles
Step-by-step solution
The abdomen in both males and females consists of 10 segments. In females, the 7th sternum is boat shaped and together with the 8th and 9th sterna forms a brood or genital pouch whose anterior part contains female gonopore, spermathecal pores and collateral glands. In males, genital pouch or chamber lies at the hind end of the abdomen bounded dorsally by 9th and 10th terga and ventrally by the 9th sternum. It contains dorsal anus, ventral male genital pore and gonapophysis. Males bear a pair of short, thread- like