Ch01 Key Concepts, Vocab

Ch01 Key Concepts, Vocab - Chapter 1: Studying Life...

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Chapter 1: Studying Life OVERVIEW Chapter 1 introduces the scientific method and the cellular and evolutionary basis of life. The key characteristics of life are presented along with the diversity of life and its evolutionary origins. Included are major events along the time line of life’s emergence, the three domains of life and such important concepts as photosynthesis and multicellularity. The chapter emphasizes the hypothesis–prediction method of studying biology and also the implications of biological research for public policy. KEY CONCEPTS 1. Most living organisms share key characteristics: consist of one or more cells, contain genetic information, reproduce themselves, have evolved, and carry out metabolism. 2. Metabolism is central to cellular activity and involves conversions of matter and energy. 3. Evolution is a change in the genetic composition of a population over generational time. 4. Reproduction continues life and provides the basis for evolution. 5. Darwin’s theory of evolution by natural selection is arguably the major unifying principle of biology. 6. Life arose from nonlife about 3.8 billion years ago when interacting systems of
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Ch01 Key Concepts, Vocab - Chapter 1: Studying Life...

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