Instruct: Classify a review into positive or negative sentiment.
Query: The persistence of basic animal body plans

This is a compelling gateway to a new perspective on evolution from the emerging developmental perspective. As the author notes at the beginning, the basic animal body plans are half a billion years old. With that the book embarks on a fascinating exploration of the relationship of evolution to development and in the process shows how our understanding, in the age of hox genes, is undergoing rapid transformation. Very interesting work indeed.