In cockroach, the excretory product is

Options

A. Ammonia
B. Uric acid
C. Urea
D. Both 1 and 3

Answer

To determine the excretory product in cockroaches, we can follow these steps:

### Step 1: Understand the types of nitrogenous waste
- There are three main types of nitrogenous wastes produced by organisms: ammonia, urea, and uric acid. Each type has different characteristics and is excreted by different groups of organisms.

### Step 2: Analyze ammonia
- Ammonia is highly toxic and requires a large amount of water to be excreted safely. It is primarily excreted by aquatic organisms that can afford to lose large amounts of water.

### Step 3: Consider urea
- Urea is less toxic than ammonia and requires less water for excretion. It is the primary nitrogenous waste product in mammals and amphibians.

### Step 4: Evaluate uric acid
- Uric acid is even less toxic than urea and requires minimal water for excretion. This makes it suitable for terrestrial organisms that need to conserve water, such as insects and reptiles.

### Step 5: Identify the organism in question
- Cockroaches are terrestrial organisms, which means they need to conserve water. Therefore, ammonia and urea would not be suitable excretory products for them.

### Step 6: Conclude the excretory product in cockroaches
- Since cockroaches are terrestrial and need to conserve water, the excretory product they produce is uric acid.

### Final Answer
- In cockroaches, the excretory product is **uric acid**.

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