Why would there be no chick developing if cells did not specialize?

If cells did not specialize, they would all remain undifferentiated and functionally identical, unable to perform the diverse roles required for the development of complex organisms like chicks. Specialized cells are essential for forming tissues and organs, each with specific functions necessary for growth, metabolism, and overall development. Without this specialization, essential processes such as nutrient absorption, gas exchange, and structural support would fail, preventing proper embryonic development. Consequently, a chick would be unable to form and develop into a viable organism.