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Explain why insects excrete uric acid as their principal nitrogenous waste. - HSC - SSCE Biology - Question 22 - 2015 - Paper 1
Question 22
Explain why insects excrete uric acid as their principal nitrogenous waste.
Worked Solution & Example Answer:Explain why insects excrete uric acid as their principal nitrogenous waste. - HSC - SSCE Biology - Question 22 - 2015 - Paper 1
Step 1
Relates a property of uric acid to its suitability as nitrogenous waste in insects.
Answer
Uric acid is excreted by insects primarily because it is relatively insoluble in water. This characteristic allows insects to conserve water, which is crucial since many insects inhabit arid environments or have limited access to water. By excreting uric acid instead of more soluble nitrogenous wastes like urea, insects minimize water loss while effectively eliminating nitrogenous waste.
Step 2
Provides some information appropriate to the elimination of nitrogenous waste in insects.
Answer
The elimination of uric acid occurs through specialized excretory structures such as Malpighian tubules, which enable the efficient processing and removal of waste while retaining as much water as possible. This adaptation is vital for survival in diverse habitats, allowing insects to thrive with minimal hydration.