Variation and Fixity in Nature / Marsh, Frank Lewis, PhD / (PB/1976-1976/B/USED)

*Condition Note: Book cover has moderate wear and is clean on the inside.*

In nature we observe both DIVERSITY and DISCONTINUITY among all plants and animals. Living things cannot be arranged in a continuous, unbroken series from simple to complex, nor can one variant be traced through a continuous series to a markedly different variant.

What do these two phenomena--diversity and discontinuity--say to us as to te origin and meaning of living things? How do the observable facts fit in with the various theories of origins? What are the strengths and weaknesses of each?

CONTENTS

Variation Everywhere
The Species, Real or Imaginary?
Species and the Genesis Kind
The Physical Basis of Heredity
Causes of Variation in Organisms
Hybridization
What Does the Fossil Record Tell Us?
Fixity Among Living Things
The Form and Structure of Living Things
Thoughts to Ponder
Glossary
References
Index

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