Among the vertebrates the group that shows highest diversity is

Options

A. Amphibians
B. Birds
C. Mammals
D. Fishes

Answer

To determine which group among vertebrates shows the highest diversity, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Vertebrates**:
- Vertebrates are animals that have a backbone. The main groups of vertebrates include fishes, amphibians, reptiles, birds, and mammals.

2. **Identify the Groups**:
- The options given are:
- A) Amphibians
- B) Birds
- C) Mammals
- D) Fishes

3. **Research Diversity in Vertebrates**:
- According to biological statistics, fishes are known to have the highest diversity among vertebrates. They are followed by birds, reptiles, amphibians, and then mammals.

4. **Consider Factors Influencing Diversity**:
- Factors such as mutation, recombination, and adaptational changes (like food availability and temperature) contribute to the diversity of species. Fishes have a high mutation rate and can adapt to various environments, which increases their diversity.

5. **Statistics on Fish Diversity**:
- There are more than 30,000 species of fishes found in both freshwater and marine environments. They also have a high reproductive rate, laying millions of eggs, which contributes to their diversity despite a high mortality rate.

6. **Conclusion**:
- Based on the information gathered, the group among vertebrates that shows the highest diversity is **fishes**.

### Final Answer:
The group that shows the highest diversity among vertebrates is **D) Fishes**.