Which group of vertebrates comprises the highest number of endangered species

Options

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

Answer

To determine which group of vertebrates comprises the highest number of endangered species, we will analyze the data provided for each group:

### Step 1: Understand the Definition of Endangered Species
- **Endangered Species**: These are species that are at high risk of extinction in the wild.

### Step 2: Gather Data on Endangered Species by Group
- **Mammals**: 177 species are endangered, which constitutes 3.8% of all mammal species.
- **Birds**: 118 species are endangered, representing 1.9% of all bird species.
- **Reptiles**: 47 species are endangered, accounting for 0.6% of all reptile species.
- **Fishes**: 158 species are endangered, which represents 0.7% of all fish species.

### Step 3: Compare the Numbers
- **Mammals**: 177 endangered species
- **Birds**: 118 endangered species
- **Reptiles**: 47 endangered species
- **Fishes**: 158 endangered species

### Step 4: Identify the Group with the Highest Number
From the gathered data, we can see that mammals have the highest number of endangered species at 177.

### Conclusion
The group of vertebrates that comprises the highest number of endangered species is **A) Mammals**.

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