The animal world is immensely diverse, and our understanding of it has
been greatly enhanced by molecular biology and the study of evolution
and development ("evo-devo"). Moreover, groundbreaking research on
genes, and especially key families of genes such as the Homeobox genes
which control the development of body plans, has led to radical changes
in the classification of animals. In this Very Short Introduction,
Peter Holland presents a cutting-edge tour of the animal kingdom,
providing an authoritative summary of the modern view of animal life,
its origins, and the new classification resulting from DNA studies.
Beginning with the definition of animals (not obvious in biological
terms), Holland takes the reader through the revolutionary new
high-level groupings of animals (phyla) based on evolutionary
relationships and ancestry. Ranging from corals and sponges to
nematodes, sea squirts, and vertebrates, and illuminating many key
topics in zoology, this fascinating, brief
overview will be of great value to all students of the life sciences as
well as providing a concise summary for the interested lay reader.