Where did Teeth Come From??

The video explores the origins of teeth, discussing three main hypotheses: the classic 'outside in' model suggesting teeth evolved from fish scales, the 'inside out' model proposing teeth originated in the mouth, and the 'inside and out' model indicating both teeth and scales evolved from basic structures. Despite various fossil evidence and genetic studies, the true origin remains debated among scientists.

What are the two main hypotheses regarding the evolution of teeth mentioned in the text?

How do teeth differ from bones according to the text?

What evidence supports the idea that scales evolved before teeth?

What is the 'inside and out model' hypothesis about the origin of teeth?

Why is the origin of teeth still considered a hot debate among scientists?