Uric acid is an excretory product of
`{:(a.,"Cockroach",b.,"Sparrow"),(c.,"Terrestrial reptiles",d.,"Man"):}`

Options

A. a & d
B. b & d
C. a, b & c
D. a, c & d

Answer

To determine which organisms excrete uric acid, we can follow these steps:

### Step 1: Understand the Types of Nitrogenous Waste
- Organisms excrete nitrogenous waste in three primary forms: ammonia, urea, and uric acid.
- Ammonia is highly toxic and requires a lot of water to be excreted.
- Urea is less toxic than ammonia and requires less water.
- Uric acid is the least toxic and requires the least amount of water for its elimination.

### Step 2: Identify Uricotelic Organisms
- Organisms that excrete uric acid are known as uricotelic organisms.
- Examples of uricotelic organisms include birds, reptiles, insects, and some terrestrial snails.

### Step 3: Analyze the Options
- **Option A: Cockroach** - Cockroaches are insects and they excrete uric acid.
- **Option B: Sparrow** - Sparrows are birds and they also excrete uric acid.
- **Option C: Terrestrial reptiles** - Terrestrial reptiles, like lizards and snakes, excrete uric acid as well.
- **Option D: Man** - Humans excrete urea, not uric acid.

### Step 4: Conclusion
- Based on the analysis, the organisms that excrete uric acid are:
- A. Cockroach
- B. Sparrow
- C. Terrestrial reptiles
- Therefore, the correct answer is **C. Terrestrial reptiles**.

### Final Answer
Uric acid is an excretory product of:
- a. Cockroach
- b. Sparrow
- c. Terrestrial reptiles