What are coenogenetic characters?

Explanation

### Step-by-Step Solution

1. **Definition of Coenogenetic Characters**: Coenogenetic characters, also known as cenogenetic characters, are newly developed traits that arise in organisms after their ancestors. These traits are not inherited from ancestors but are adaptations that occur due to environmental pressures.

2. **Characteristics of Coenogenetic Characters**: These characters are typically associated with the process of evolution and adaptation. They can be seen as modifications that help organisms survive and thrive in their specific environments.

3. **Example of Coenogenetic Characters**: A classic example of coenogenetic characters is the long neck of the giraffe. Initially, giraffes had shorter necks, but over time, through the process of natural selection, they developed longer necks. This adaptation allowed them to reach leaves on tall trees, which were otherwise inaccessible.

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