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CH._1_Outline_11e[1] - 1 INVITATION TO BIOLOGY Key Terms...

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1 1 INVITATION   TO   BIOLOGY Key Terms cell tissues organs organ systems community ecosystem biosphere producers consumers decomposers receptors stimulus homeostasis DNA inheritance reproduction development species genus, genera Bacteria Archaea Eukarya Prokaryotic protists plants fungi animals mutation trait evolution natural selection artificial selection Lecture Outline            Impacts, Issues:  What Am I Doing Here? A. Current world events seem chaotic. 1. Humans spill oil that threatens aquatic life. 2. Diseases such as AIDS destroy lives. 3. Even the global temperatures seem to be unstable. B. But past world events also have been destructive. 1. Bioterrorism was around in 1346 when soldiers hurled corpses of plague victims over  walled cities. 2. In 1918, Spanish flu raced around the world, killing over 30 million people. C.  Studying biology is one way humans develop a perspective on the world. 1.1 Levels of Organization in Nature A. Making Sense of the World 1. Biologists have a particular way of interpreting the world. B. A Pattern in Biological Organization 1. A general pattern of organization in nature begins with atoms and molecules. 2. The cell, composed of “biological molecules,” is the smallest unit of life.
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3. Multicelled organisms have increasingly complex levels of organization that result in  tissues >> organs >> organ systems >> organisms >> populations >> communities >>  ecosystems >> biosphere.
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