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Structural Organisation in Animals question

2021 · Q62
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Structural Organisation in Animals question

2021 · Q62

NEETBiologyStructural Organisation in AnimalsMCQ+4 / −1
Which of the following characteristics is incorrect with respect to cockroach?
  1. A
    10th abdominal segment in both sexes, bears a pair of anal cerci
  2. B
    A ring of gastric caeca is present at the junction of midgut and hind gut
  3. C
    Hypopharynx lies within the cavity enclosed by the mouth parts
  4. D
    In females, 7th-9th sterna together form a genital pouch
View written solutionFree

Correct answer: B

∙\bullet∙ Option (b) is incorrect because a ring of gastric caecae is present at the junction of foregut and midgut. At the junction of midgut and hindgut, malpighian tubules are present.

∙\bullet∙ Hypopharynx lies within the cavity enclosed by mouthparts.

∙\bullet∙ In female cockroach, the 7th sternum is boat shaped and together with the 8th and 9th sterna forms a genital pouch.

∙\bullet∙ 10th abdominal segment in both sexes, bears a pair of anal cerci and 9th sternum only in male cockroach, bears a pair of chitinous anal style.

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