In snakes, poison fangs are modified________.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Structure**: In snakes, the fangs are specialized teeth that are used to inject venom into their prey.

2. **Modification of Fangs**: The question asks how these poison fangs are modified. In snakes, these fangs are modified into elongated structures known as "tits" (which is likely a transcription error and should refer to "tubular" or "tines").

3. **Function of the Fangs**: The primary function of these modified fangs is to deliver venom. The venom is produced by salivary glands and is injected through these fangs when the snake bites its prey.

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