Question

Which type of nitrogenous wastes is excreted by living organisms?

• A. Urea
• B. Ammonia
• C. Uric acid
• D. All of these

Hint:

Organisms excrete nitrogenous waste in different forms: - Ureotelic (urea) - Humans, amphibians. - Ammonotelic (ammonia) - Fish, amphibians. - Uricotelic (uric acid) - Birds, reptiles.

Answer 1

The Correct Option is D

Step 1: Understanding nitrogenous waste excretion. Different organisms excrete different nitrogenous wastes based on their habitat and evolutionary adaptations:
- Ureotelic organisms (humans, amphibians) excrete urea.
- Ammonotelic organisms (fish, amphibians) excrete ammonia.
- Uricotelic organisms (birds, reptiles) excrete uric acid.
Step 2: Explanation of correct answer. Since different living organisms excrete different nitrogenous wastes, the correct answer is "All of these."