Abstract
This essay is part of the fourth yearly presentation of an educational project of the American Society of Zoologists. The purpose is to offer suggestions for improving the first-year biology courses in colleges and universities. We emphasize the conceptual framework of the biological sciences, show how scientific information is obtained and validated, and relate science to human concerns. The topic for consideration this year is Developmental Biology . This essay gives some of the background information—mainly classical experimental embryology. The speakers in the symposium will deal with more recent discoveries and insights.
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