Reptiles and Aves (Birds) show similarities in all except -

Options

A. Dioecious forms
B. Oviparous, internal fertilization
C. Creeping / Crawling locomotion
D. Direct development

Answer

To solve the question regarding the similarities between Reptiles and Aves (Birds), we will analyze the characteristics of both groups and identify the one that does not show similarity.

### Step-by-Step Solution:

1. **Identify the Characteristics of Reptiles and Aves:**
- Both reptiles and birds are classified as diapsids, which means they have two temporal fenestrae in their skulls.
- They are both oviparous, meaning they lay eggs.
- Both groups exhibit internal fertilization.
- They both show direct development, meaning they do not have a larval stage.

2. **Examine Locomotion:**
- Reptiles typically exhibit crawling locomotion, using their limbs to move on land.
- Birds, on the other hand, are adapted for flight and use their wings for locomotion.

3. **Compare the Characteristics:**
- Dioceses (separate sexes): Similar in both groups.
- Oviparous and internal fertilization: Similar in both groups.
- Crawling locomotion (Reptiles) vs. flying locomotion (Birds): This is a significant difference.
- Direct development: Similar in both groups.

4. **Conclusion:**
- The characteristic that shows a difference between reptiles and birds is the type of locomotion. Reptiles crawl while birds fly. Therefore, the answer to the question is the locomotion type.

### Final Answer:
Reptiles and Aves (Birds) show similarities in all except **locomotion**.

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