Animals Without Backbones

Animals Without Backbones

Author: Bobbie Kalman

Publisher: Crabtree Publishing Company

Published: 2008-09-30

Total Pages: 36

ISBN-13: 9780778732792

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Invertebrates do not have backbones or internal skeletons, but some have hard coverings. Invertebrates are weird and wonderful creatures that come in every shape and color imaginable! Children will love the exciting photos!


An Introduction to the Invertebrates

An Introduction to the Invertebrates

Author: Janet Moore

Publisher: Cambridge University Press

Published: 2006-09-21

Total Pages: 283

ISBN-13: 1139458477

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So much has to be crammed into today's biology courses that basic information on animal groups and their evolutionary origins is often left out. This is particularly true for the invertebrates. The second edition of Janet Moore's An Introduction to the Invertebrates fills this gap by providing a short updated guide to the invertebrate phyla, looking at their diverse forms, functions and evolutionary relationships. This book first introduces evolution and modern methods of tracing it, then considers the distinctive body plan of each invertebrate phylum showing what has evolved, how the animals live, and how they develop. Boxes introduce physiological mechanisms and development. The final chapter explains uses of molecular evidence and presents an up-to-date view of evolutionary history, giving a more certain definition of the relationships between invertebrates. This user-friendly and well-illustrated introduction will be invaluable for all those studying invertebrates.


Animals Without Backbones

Animals Without Backbones

Author: Bridget Anderson

Publisher: World of Science: Come Learn w

Published: 2003-02

Total Pages: 0

ISBN-13: 9781890674144

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Discusses what invertebrates are and how they are classified, and provides in-depth information about many specific invertebrates, such as insects, sponges, and jellyfish.


Across the Bridge

Across the Bridge

Author: Henry Gee

Publisher: University of Chicago Press

Published: 2018-07-04

Total Pages: 325

ISBN-13: 022640319X

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“Addresses an important topic for biologists and zoologists about vertebrates’ place in the ‘grand scheme’ . . . genuinely witty and charming . . . magnificent.” —Neil J. Gostling, University of Southampton Our understanding of vertebrate origins and the backbone of human history evolves with each new fossil find and DNA map. Many species have now had their genomes sequenced, and molecular techniques allow genetic inspection of even non-model organisms. But as longtime Nature editor Henry Gee argues in Across the Bridge, despite these giant strides and our deepening understanding of how vertebrates fit into the tree of life, the morphological chasm between vertebrates and invertebrates remains vast and enigmatic. As Gee shows, even as scientific advances have falsified a variety of theories linking these groups, the extant relatives of vertebrates are too few for effective genetic analysis. Moreover, the more we learn about the species that do remain—from sea-squirts to starfish—the clearer it becomes that they are too far evolved along their own courses to be of much use in reconstructing what the latest invertebrate ancestors of vertebrates looked like. Fossils present yet further problems of interpretation. Tracing both the fast-changing science that has helped illuminate the intricacies of vertebrate evolution as well as the limits of that science, Across the Bridge helps us to see how far the field has come in crossing the invertebrate-to-vertebrate divide—and how far we still have to go. “A beautiful ode to some of the least appreciated animals . . . guides the reader joyfully through deuterostomes—weaving disparate elements of embryology, paleontology, and morphology into an unprecedented and accessible narrative.” —Jakob Vinther, University of Bristol


Roly-Poly Pillbugs

Roly-Poly Pillbugs

Author: Molly Smith

Publisher: Bearport Publishing

Published: 2009-01-01

Total Pages: 28

ISBN-13: 1597167541

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Describes the physical characteristics, life cycle, diet, habitat, and lifespan of the pillbug.