Nitrogenous excretory product of tadpole of frog is

Options

A. Urea
B. Guanine
C. Uric acid
D. Ammonia

Answer

To determine the nitrogenous excretory product of a tadpole of a frog, we can follow these steps:

### Step 1: Understand the Life Cycle of a Frog
- Frogs undergo metamorphosis, starting their life as tadpoles in water and later transforming into adult frogs that can live on land.

**Hint:** Consider the environment in which the tadpole lives and how it affects its excretion.

### Step 2: Identify the Excretory Products
- Nitrogenous waste products can be ammonia, urea, or uric acid. Different organisms excrete different forms based on their habitat and physiology.

**Hint:** Recall the forms of nitrogenous waste and the typical organisms that excrete them.

### Step 3: Analyze the Tadpole's Environment
- Since tadpoles are aquatic, they can easily excrete ammonia, which is highly soluble in water and can be eliminated through diffusion.

**Hint:** Think about how the solubility of waste products influences their excretion in aquatic versus terrestrial environments.

### Step 4: Compare with Adult Frogs
- In contrast, adult frogs, which are terrestrial, primarily excrete urea as their nitrogenous waste product to conserve water.

**Hint:** Remember that the transition from aquatic to terrestrial life changes the way organisms manage waste.

### Step 5: Conclusion
- Therefore, the nitrogenous excretory product of a tadpole of a frog is ammonia.

**Final Answer:** Ammonia

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