In which group are animals more alike

Options

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

Answer

To determine which group of animals is more alike, we can analyze the characteristics of the given groups: mammals, birds, amphibians, and reptiles.

### Step-by-Step Solution:

1. **Identify the Groups**: We have four groups to consider: mammals, birds, amphibians, and reptiles.

2. **Analyze Mammals**:
- Mammals show a wide range of diversity in their characteristics. For example, whales are aquatic and have streamlined bodies, while humans are bipedal and walk on two legs. Other mammals like tigers and lions walk on four legs.
- Due to this diversity in morphology and behavior, mammals are not a cohesive group in terms of similarity.

3. **Analyze Birds**:
- Birds share several key characteristics: they have wings (modified front limbs), feathers, and beaks instead of teeth.
- All birds exhibit bipedal locomotion, meaning they walk on two legs. These features are consistent across the bird group, making them more alike compared to mammals.

4. **Analyze Amphibians**:
- Amphibians, such as frogs and salamanders, also show diversity. For instance, frogs have a distinct morphology compared to salamanders, which can resemble fish.
- This variation in form and function indicates that amphibians are not as similar to each other.

5. **Analyze Reptiles**:
- Reptiles include a variety of species such as lizards, tortoises, and snakes, each with different morphological features.
- For example, lizards have a different body structure compared to tortoises. This diversity means reptiles do not form a homogenous group.

6. **Conclusion**:
- After analyzing all groups, birds exhibit the most consistent and similar characteristics among their members. Therefore, the answer to the question is that **birds are the group in which animals are more alike**.

### Final Answer:
The group in which animals are more alike is **birds**.