Acknowledgments; Part 1: Discrete Process in Biology; Chapter 1: The Theory of Linear Difference Equations Applied to Population Growth; Chapter 2: Nonlinear Difference Equations; Chapter 3: Applications of Nonlinear Difference Equations to Population Biology; Part 2: Continuous Processes and Ordinary Differential Equations; Chapter 4: An Introduction to Continuous Models; Chapter 5: Phase-Plane Methods and Qualitative Solutions; Chapter 6: Applications of Continuous Models to Population Dynamics; Chapter 7: Models for Molecular Events; Chapter 8: Limit Cycles, Oscillations, and Excitable Systems; Part 3: Spatially Distributed Systems and Partial Differential Equation Models; Chapter 9: An Introduction to Partial Differential Equations and Diffusion in Biological Settings; Chapter 10: Partial Differential Equation Models in Biology; Chapter 11: Models for Development and Pattern Formation in Biological Systems; Selected Answers; Author Index; Subject Index