Life, the science of biology / William K. Purves, Gordon H. Orians, H. Craig Heller. Purves, William K. (William Kirkwood), 1934- Orians, Gordon H. Heller, H. Craig. Biology. QH308.2 .P87 1994 574 20 W4338 Includes bibliographical references and index. Sunderland, Mass. : Sinauer Associates ; Salt Lake City, Utah : W.H. Freeman, c1995. c1995. 1994 Text 1195, 34, 2, 5, 41 p. : eng