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? 2011 Pearson Education, Inc. LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson Lectures by Erin Barley Kathleen Fitzpatrick The Chemical Context of Life Chapter 2 Overview: A Chemical Connection to Biology ? Biology is a multidisciplinary science ? Living organisms are subject to basic laws of physics and chemistry ? One example is the use of formic acid by ants to maintain ?devil?s gardens,? stands of Duroia trees ? 2011 Pearson Education, Inc. Figure 2.2 Duroia tree Devil?s garden Cedrela sapling Inside, unprotected Inside, protected Insect barrier Outside, protected Outside, unprotected EXPERIMENT