Q.Which of the following is not correctly paired?
a. Humans – Ureotelic
b. Birds – Uricotelic
c. Lizards – Uricotelic
d. Whale – Ammonotelic

Step 1. Check each pairing against the chapter's stated excretion type per class: Humans are mammals, and mammals are described as ureotelic (excreting urea) — pairing (a) is correct.

Step 2. Birds are described as uricotelic (excreting uric acid, a water-conserving adaptation) — pairing (b) is correct. Reptiles, including lizards, are likewise uricotelic — pairing (c) is correct. …

Check each option's excretion type against the class it belongs to, using the chapter's sta …

• Assuming a fully aquatic mammal like the whale should share the ammonotelic excretion of fish, forgetting that it is still a mammal physiologically. …