Select the correct statement from the ones given below with respect to Periplaneta americana.

  • Option 1)

    Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives.

  • Option 2)

    Males bear a pair of short thread like anal styles.

  • Option 3)

    There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut.

  • Option 4)

    Grinding of food is carried out only by the mouth parts.

 

Answers (1)
D Divya Saini

As we discussed in

Anal Styles -

In male, the 9th sternite (segment) bears a pair of spine like anal styles, which are absent in female and are used to differentiate between male and female. 

- wherein

Additionally male cockroaches have long antennae than female. 
 

 

 Anal styles are present in make cockroaches.


Option 1)

Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives.

Incorrect

Option 2)

Males bear a pair of short thread like anal styles.

Correct

Option 3)

There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut.

Incorrect

Option 4)

Grinding of food is carried out only by the mouth parts.

Incorrect

Exams
Articles
Questions