**Core Concept**
The enamel knot is a cluster of non-dividing cells located at the tip of the tooth bud, playing a crucial role in the initiation and patterning of tooth development. It is a signaling center that regulates the expression of genes involved in tooth morphogenesis.

**Why the Correct Answer is Right**
Destruction of the enamel knot disrupts the normal patterning of the tooth, leading to an abnormal tooth shape and size. The enamel knot is responsible for the expression of genes such as MSX1 and PAX9, which are critical for the formation of the dental mesenchyme and the differentiation of ameloblasts. Without the enamel knot, these processes are severely impaired, resulting in an abnormal tooth morphology.

**Why Each Wrong Option is Incorrect**
**Option A:** This is not a known consequence of enamel knot destruction.
**Option B:** This is a consequence of enamel hypoplasia, not enamel knot destruction.
**Option C:** This is a feature of genetic disorders affecting tooth development, not a direct result of enamel knot destruction.

**Clinical Pearl / High-Yield Fact**
The enamel knot is a critical signaling center in tooth development, and its disruption can lead to a range of dental abnormalities, including tooth agenesis, hypodontia, and microdontia.

**Correct Answer: C. Tooth agenesis or hypodontia.**