TAILIEUCHUNG - Lecture Biology (6e): Chapter 1 - Campbell, Reece

Chapter 1 - Introduction: Ten themes in the study of life. After reading this chapter and attending lecture, the student should be able to: Briefly describe unifying themes that pervade the science of biology, diagram the hierarchy of structural levels in biology, explain how the properties of life emerge from complex organization,. | CHAPTER 1 INTRODUCTION: TEN THEMES IN THE STUDY OF LIFE Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A1: Exploring Life on its Many Levels 1. Each level of biological organization has emergent properties Biology, the study of life, is rooted in the human spirit. Biology is the scientific extension of the human tendency to connect to and be curious about life. The adventure of biology takes us: Into a variety of environments to investigate ecosystems. To the laboratory to examine how organisms work. Into the microscopic world to explore cells and the submicroscopic to explore molecules in cells. Back in time to investigate the history of life. Introduction Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings This is the most exciting era for biology. The largest and best-equipped community of scientists in history is beginning to solve problems that once seemed insolvable. Genetics and cell biology are revolutionizing medicine and agriculture. Molecular biology provides new tools to trace the origins and dispersal of early humans. Ecology is helping evaluate environmental issues. Neuroscience and evolutionary biology are reshaping psychology and sociology. Unifying themes pervade all of biology. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Life’s basic characteristic is a high degree of order. Biological organization is based on a hierarchy of structural levels, each building on the levels below. At the lowest level are atoms that are ordered into complex biological molecules. Many molecules are arranged into minute structures called organelles, which are the components of cells. 1. Each level of biological organization has emergent properties Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. (1) Fig. (2) Cells are the subunits of organisms, the units of life. Some organisms consist of a single cells, others are multicellular aggregates of .

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