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Solution


Q.

Which of the following characteristics is incorrect with respect to cockroach               [2021]
1 10th abdominal segment in both sexes bears a pair of anal cerci.  
2 A ring of gastric caeca is present at the junction of midgut and hindgut.  
3 Hypopharynx lies within the cavity enclosed by the mouth parts.  
4 In females, 7th–9th sterna together form a genital pouch.  

Ans.

(2)

In cockroach, a ring of 6–8 blind tubules called hepatic or gastric caeca is present at the junction of the foregut and midgut.