which of the following is an incorrect match between organisms and their main excretory product

Options

A. Cray fish (organisms) - Ammoria (excretory product)
B. human (organisms) - urea (excretory product)
C. birds(organisms) - uric acid (excretory product)
D. frog (organisms) - ammonia (excretory product)

Answer

To determine which of the following is an incorrect match between organisms and their main excretory product, we need to analyze each option provided. The main excretory products are ammonia, urea, and uric acid, and organisms can be classified based on these products as ammonotelic, ureotelic, or uricotelic.

### Step-by-Step Solution:

1. **Understand Excretory Products**:
- **Ammonia**: Excreted by ammonotelic organisms, primarily aquatic animals, due to its high toxicity and water solubility.
- **Urea**: Excreted by ureotelic organisms, such as mammals, including humans, which helps in conserving water.
- **Uric Acid**: Excreted by uricotelic organisms, such as birds and reptiles, to minimize water loss.

2. **Evaluate Each Option**:
- **Option 1: Crayfish** - Crayfish are aquatic organisms that excrete ammonia. This is a correct match.
- **Option 2: Humans** - Humans are terrestrial and excrete urea. This is also a correct match.
- **Option 3: Birds** - Birds excrete uric acid to conserve water. This is a correct match.
- **Option 4: Frog** - Frogs can excrete ammonia when in water (ammonotelic) but primarily excrete urea when on land (ureotelic). Since frogs mostly live on land, they are ureotelic, making this an incorrect match.

3. **Conclusion**:
- The incorrect match is **Option 4: Frog**, as it is not primarily ammonotelic but ureotelic when on land.

### Final Answer:
The incorrect match between organisms and their main excretory product is **Option 4: Frog**.