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Structural Organisation in Animals question

2011 · Q54
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Structural Organisation in Animals question

2011 · Q54

NEETBiologyStructural Organisation in AnimalsMCQ+4 / −1
Which of the following is correctly stated as it happens in the common cockroach ?
  1. A
    Oxygen is transported by haemoglobin in blood
  2. B
    The food is ground by mandibles and gizzard
  3. C
    Nitrogenous excretory product is urea
  4. D
    Malpighian tubules are excretory organs projecting out from the colon
View written solutionFree

Correct answer: B

Mouth part of cockroach contain two mandibles, which bears teeth. When both the mandibles work simultaneously in a horizontal plane, the food matter is cut and masticated into fine and smaller pieces. Gizzard is a part of alimentary canal. It bears six muscular folds which are covered by chitinous conical plates, the teeth, used for grinding the food.

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