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 solve the question of which organism has an incorrect match with its main excretory product, we can analyze each option provided:

1. **Crayfish - Ammonia**:
- Crayfish are aquatic organisms and excrete ammonia as their main waste product. This is correct because ammonia is highly soluble in water and can be easily excreted by aquatic animals.

2. **Humans - Urea**:
- Humans primarily excrete urea, which is a less toxic form of nitrogen waste compared to ammonia. This is also a correct match, as humans convert ammonia to urea in the liver to safely excrete it.

3. **Birds - Uric Acid**:
- Birds excrete uric acid, which is a semi-solid form of nitrogen waste. This adaptation helps them conserve water and reduce weight for flight. This match is correct as well.

4. **Frog - Ammonia**:
- Frogs primarily excrete urea, not ammonia. While amphibians can excrete ammonia when in water, adult frogs predominantly excrete urea to conserve water and reduce toxicity. Therefore, this match is incorrect.

Based on the analysis, the incorrect match is **Frog - Ammonia**.

### Steps:
1. Identify the excretory product of each organism.
2. Compare the excretory products with the known excretory products of the respective organisms.
3. Determine which match is incorrect based on biological knowledge.