Chapter1 Lecture Notes F07

Chapter1 Lecture Notes F07 - Biology Scientific study of...

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1 Biology Scientific study of life Foundation of asking basic questions about life and the natural world Life’s Underlying Unity Life’s organization extends from the molecular level to the biosphere Shared features at the molecular level are the basis of life’s unity Why Study Biology Biology is a way of thinking critically about life Biology can help us to better understand human impact on nature, such as an oil field burning out of control during the Persian Gulf War Levels of Organization Cell Multicelled organism Population Community Ecosystem Biosphere
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2 Fig. 1-1a, p.2 Atom Smallest unit of an element that still retains the element’s properties Electrons, protons, and neutrons are its building blocks Fig. 1-1b, p.2 Molecule Two or more joined atoms of the same or different elements The “molecules of life” are complex carbohydrates, lipids, proteins, DNA, and RNA Fig. 1-1c, p.2 Cell Smallest unit that can live and reproduce on its own or as part of a multicellular organism It has an outer membrane, DNA, and other components Fig. 1-1d, p.2 Tissue Organized cells and substances that interact in a specialized activity Many cells (white) made this bone tissue from their own secretions
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3 Fig. 1-1e, p.2 Organ Two or more tissues interacting in some task. A parrotfish eye, for example, is a sensory organ used in vision Fig. 1-1f, p.2 Organ System Organs interacting physically, chemically, or both in
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This note was uploaded on 01/05/2009 for the course BIO 111 taught by Professor Goschke during the Spring '07 term at Cal Poly.

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Chapter1 Lecture Notes F07 - Biology Scientific study of...

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