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Questions and Answers
Which animals are typically ammonotelic in nature?
Which animals are typically ammonotelic in nature?
Which nitrogenous waste requires the least amount of water for its elimination?
Which nitrogenous waste requires the least amount of water for its elimination?
What necessitated the production of lesser toxic nitrogenous wastes like urea and uric acid?
What necessitated the production of lesser toxic nitrogenous wastes like urea and uric acid?
Which animals excrete ammonia through gill surfaces?
Which animals excrete ammonia through gill surfaces?
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What is the major form of nitrogenous waste excreted by animals?
What is the major form of nitrogenous waste excreted by animals?
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Which nitrogenous waste is the most toxic form and requires a large amount of water for its elimination?
Which nitrogenous waste is the most toxic form and requires a large amount of water for its elimination?
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Which of the following animals are typically ammonotelic in nature?
Which of the following animals are typically ammonotelic in nature?
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Which of the following animals excrete ammonia through gill surfaces?
Which of the following animals excrete ammonia through gill surfaces?
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What necessitated the production of lesser toxic nitrogenous wastes like urea and uric acid?
What necessitated the production of lesser toxic nitrogenous wastes like urea and uric acid?
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Which animals are not significant in the removal of ammonia through their kidneys?
Which animals are not significant in the removal of ammonia through their kidneys?
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Study Notes
Nitrogenous Waste and Excretion Methods
- Ammonotelic Animals: Typical ammonotelic animals include many aquatic species such as bony fish, amphibian larvae, and some invertebrates that excrete ammonia directly into the water.
- Least Water Requirement: Uric acid requires the least amount of water for elimination compared to other nitrogenous wastes, making it an efficient option for organisms in arid environments.
- Necessity for Urea and Uric Acid: The production of less toxic nitrogenous wastes like urea and uric acid was necessitated by the evolutionary need to conserve water, particularly for terrestrial animals and those in environments where water is scarce.
- Ammonia Excretion via Gill Surfaces: Fish, particularly bony fish, excrete ammonia through their gill surfaces, allowing for efficient nitrogen waste removal directly into the surrounding water.
- Major Form of Nitrogenous Waste: The major form of nitrogenous waste excreted by animals is ammonia, especially in aquatic organisms where dilution is possible.
- Most Toxic Nitrogenous Waste: Ammonia is the most toxic form of nitrogenous waste and requires a large volume of water for its elimination, posing a challenge for terrestrial organisms.
- Ammonotelic Animals Examples: Examples of typical ammonotelic animals include most teleost fish, certain amphibian larvae, and some aquatic invertebrates.
- Ammonia Excretion in Specific Animals: Bony fish and some aquatic invertebrates are prominent examples of animals that excrete ammonia through their gills.
- Necessity for Urea and Uric Acid: Organisms that evolved in terrestrial habitats or limited water availability have developed mechanisms to synthesize urea and uric acid to manage nitrogenous waste more efficiently.
- Ammonia Removal and Kidneys: Animals such as certain reptiles and birds do not play a significant role in ammonia removal through their kidneys, as they primarily excrete nitrogen in forms like uric acid.
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Description
Test your knowledge of the excretory system with this biology quiz covering topics such as human excretory system, urine formation, kidney function, and disorders of the excretory system. Explore the accumulation of substances like ammonia, urea, uric acid, carbon dioxide, water, and ions in animals.
