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Uric acid is chief excretory product in –
- a)Insects
- b)Earthworms
- c)Amphibians
- d)Mammals
Correct answer is option 'A'. Can you explain this answer?
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Uric acid is chief excretory product in –a)Insectsb)Earthwormsc)...
Uric Acid as the Chief Excretory Product in Insects
Introduction:
Uric acid is a waste product that is formed from the breakdown of purines, which are nitrogenous compounds found in nucleic acids. It is excreted by various organisms as a means of eliminating excess nitrogen from their bodies. In insects, uric acid serves as the chief excretory product.
Insects:
- Uric acid production: Insects have a unique excretory system that involves the production of uric acid as the primary waste product.
- Advantages of uric acid: Uric acid has several advantages for insects:
- It is insoluble in water, which allows insects to conserve water in their bodies.
- It can be stored as a solid, which reduces the need for excessive water loss during excretion.
- It requires less energy for its synthesis compared to other nitrogenous waste products like ammonia or urea.
- Excretion: Insects excrete uric acid through specialized structures called Malpighian tubules. These tubules actively transport uric acid from the hemolymph (insect equivalent of blood) into the digestive system, where it is mixed with feces and eliminated from the body.
Comparison with other organisms:
- Earthworms: Earthworms excrete nitrogenous waste primarily in the form of ammonia, which is produced by their nephridia.
- Amphibians: Amphibians, such as frogs and salamanders, excrete nitrogenous waste in the form of urea through their kidneys.
- Mammals: Mammals, including humans, excrete nitrogenous waste mainly as urea through their kidneys.
Conclusion:
Insects have evolved a unique excretory system that utilizes uric acid as the chief waste product. This adaptation allows them to conserve water, store waste as a solid, and minimize energy expenditure. In contrast, other organisms like earthworms, amphibians, and mammals excrete different nitrogenous waste products such as ammonia or urea.
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Uric acid is chief excretory product in –a)Insectsb)Earthwormsc)Amphibiansd)MammalsCorrect answer is option 'A'. Can you explain this answer?
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