What is the excretory product of aquatic animals?

Correct option is A

Correct Answer: (a) Ammonia

Explanation:

• Aquatic animals, particularly ammonotelic organisms like fish, amphibians, and some invertebrates, primarily excrete ammonia as their nitrogenous waste product.
• Ammonia is highly toxic and requires large amounts of water to be diluted and excreted efficiently.
• Aquatic environments provide an abundant supply of water, allowing these animals to excrete ammonia directly through their gills or body surface.

Key Characteristics of Excretory Products in Aquatic Animals:

• Ammonia: Toxic but water-soluble, allowing rapid elimination.
• Requires minimal energy for synthesis compared to other nitrogenous waste forms.
• Common in bony fish, amphibians, and aquatic invertebrates.

Additional Knowledge:

• Uric acid: Incorrect, as it is the primary excretory product of uricotelic animals like birds, reptiles, and insects.
• Urea: Incorrect, as it is excreted by ureotelic animals like mammals and amphibians in terrestrial environments.
• Creatinine: Incorrect, as it is a byproduct of muscle metabolism, primarily excreted by mammals along with urea.

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