Which among them is not the characteristic of Turtle?

Options

A. They are oviparous
B. They are terrestrial
C. Sexes are separate
D. Heart is three-chambered

Explanation

To determine which characteristic is not applicable to turtles, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Oviparous**:
- Turtles are known to be oviparous, meaning they lay eggs that develop into young ones after a certain period. This characteristic is true for turtles.
- **Conclusion**: This option is a characteristic of turtles.

2. **Analyzing Terrestrial**:
- Turtles can inhabit various environments, including aquatic, semi-aquatic, and terrestrial habitats. While many turtles are primarily aquatic, some species are indeed terrestrial.
- **Conclusion**: This option can be considered a characteristic of turtles.

3. **Examining Sexes are Separate**:
- In turtles, sexes are separate (i.e., there are distinct male and female turtles). However, it can be challenging to differentiate between male and female turtles due to the lack of prominent external genitalia.
- **Conclusion**: This option is a characteristic of turtles.

4. **Evaluating Heart Structure**:
- Turtles possess a three-chambered heart, which is a common characteristic among reptiles. This is true for turtles.
- **Conclusion**: This option is a characteristic of turtles.

5. **Identifying the Incorrect Option**:
- After analyzing all options, we find that all options provided (oviparous, terrestrial, sexes are separate, and heart is three-chambered) are indeed characteristics of turtles. However, the phrasing of the question suggests that one option is not a characteristic. The confusion arises mainly from the interpretation of "terrestrial" as turtles can be primarily aquatic or semi-aquatic.
- Therefore, the option that is least characteristic of turtles, considering their diverse habitats, is "they are terrestrial."

### Final Answer:
The option that is **not** a characteristic of turtles is: **They are terrestrial.**

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