Ch_02_Lecture_1[1]

Ch_02_Lecture_1[1] - Chapter 2 The Chemical Basis of Life 1...

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1 Chapter 2 The Chemical Basis of Life
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2 Nature’s Chemical Language The rattlebox moth Produces chemicals important for mating and defense 0 Come mate with me! Stay away!
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3 The compound produced during mating Allows the moths to communicate using chemicals Thomas Eisner of Cornell University Has studied this process in rattlebox moths 0 Come mate with me!
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4 Chemicals play many more roles in life than signaling. e.g.? Making up our bodies, those of other organisms, and the physical environment 0 It all begins with atoms and molecules!
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5 ELEMENTS, ATOMS, AND MOLECULES 92 naturally occurring elements 0 − basic chemical units that cannot be broken apart by typical chemical processes What are “ elements ”? 2.1 Living organisms are composed of about 25 chemical elements atom ” – the name for an elemental unit essential to life – about 25 different chemical elements How many of them are essential to life?
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6 Carbon, hydrogen, oxygen, and nitrogen Make up the bulk of living matter 0
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7
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Ch_02_Lecture_1[1] - Chapter 2 The Chemical Basis of Life 1...

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