In primates; a tooth with single conical cusp and single root is seen in:
**Core Concept**
The question is testing the classification and characteristics of teeth in primates, specifically the morphology and anatomy of teeth in the primate dentition. The correct answer requires knowledge of the different types of teeth, their cusps, and roots.
**Why the Correct Answer is Right**
In primates, the tooth with a single conical cusp and single root is the incisor. Incisors are the front teeth, and they are characterized by a single cusp (the pointed part of the tooth) and a single root. This is in contrast to canines and premolars, which have multiple cusps and roots. The single conical cusp of incisors is adapted for cutting and piercing food, and the single root provides stability and support for the tooth.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because incisors are not characterized by having multiple roots. Having multiple roots is a feature of other types of teeth, such as premolars and molars.
* **Option B:** This option is incorrect because canines have a single cusp, but they also have a single root, which is not the characteristic being tested.
**Clinical Pearl / High-Yield Fact**
In the primate dentition, incisors are the only teeth with a single root and a single conical cusp. This unique morphology is adapted for cutting and piercing food, and is a key feature that distinguishes incisors from other types of teeth.
**Correct Answer:** C. Incisor.