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Ch01_Lecture - 1 Studying Life 1 Studying Life 1.1 What Is...

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1 Studying Life
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1 Studying Life 1.1 What Is Biology? 1.2 How Is All Life on Earth Related? 1.3 How Do Biologists Investigate Life? 1.4 How Does Biology Influence Public Policy?
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1.1 What is Biology? Biology: the scientific study of living things Living things: all the organisms descended from a single-celled ancestor.
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1.1 What is Biology? Characteristics of living organisms: 1.Consist of one or more cells 2.Contain genetic information 3.Use genetic information to reproduce themselves 4.Are genetically related and have evolved
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1.1 What is Biology? Characteristics of living organisms: 1.Can convert molecules from their environment into new biological molecules 2.Can extract energy from the environment and use it to do biological work 3.Can regulate their internal environment
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1.1 What is Biology? Evolution: a central theme Living systems evolve through differential survival and reproduction.
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1.1 What is Biology? Life 1. Consist of one or more cells Unicellular organisms: a single cell carries out all the functions of life Multicellular organisms: made of many cells that are specialized for different functions
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1.1 What is Biology? Life 2. Contain genetic information DNA: the information that is passed from parent to daughter cells Genome: sum total of all the DNA in the cell All cells in a multicellular organism have the same genome.
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1.1 What is Biology?
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