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Animal Kingdom

Question
CBSEENBI11003491
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Which of the following waste products in grasshopper is not excreted and is used in other metabolic activities

  • Carbon dioxide

  • Water

  • Uric acid

  • Faeces

Solution

B.

Water

Excretory organs of grasshopper are the Malpighian tubules and the main excretory product  is uric acid. Malpighian tubules of insects such as grasshoppers not only help to excrete the waste but also function to conserve water, which is then used in other metabolic activities. In the Malpighian tubules, bicarbonates of potassium and sodium, water and uric acid are formed during the process, of excretion. A large amount of water and bicarbonates of potassium and sodium are reabsorbed by the cells of Malpighian tubules and then transferred to the blood (haemolymph). Uric acid is carried to the alimentary canal of the insect and is finally passed out through anus.

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