Question

Which animal was not Uricotelic?

• A. Birds
• B. Land snail
• C. Reptiles
• D. Adult Frog

Hint:

An easy way to remember the excretory products based on habitat:
Aquatic (fish, tadpoles) $\rightarrow$ Ammonotelic.
Terrestrial/Semi-aquatic (mammals, adult frogs) $\rightarrow$ Ureotelic.
Highly dry-adapted/Aerial (birds, reptiles, snails) $\rightarrow$ Uricotelic.

Answer 1

The Correct Option is D

Step 1: Recall what uricotelic means.
Uricotelic animals excrete nitrogenous waste mainly as uric acid, which is insoluble and can be voided as a semi-solid paste, a major water-saving adaptation.
Step 2: Check each option against this definition.
Birds are classic uricotelic animals since they need to conserve water and keep the egg's nitrogenous waste from being toxic to the embryo. Reptiles are also uricotelic for similar dry-habitat, egg-laying reasons. Land snails, being terrestrial and needing to conserve water, excrete uric acid as well and are uricotelic.
Step 3: Identify the exception.
The adult frog lives in a moist environment with easy access to water and excretes nitrogenous waste mainly as urea, making it ureotelic, not uricotelic.
\[ \boxed{\text{Adult Frog}} \]