chapt01_lecture - Basic Life Diversity Biology 1510 Wayne...

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“Basic Life Diversity” Biology 1510 Wayne State University Spring/Summer, 2010 Instructor: Martin Crozier
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2 Bio 1510 The Nature of Science and Biology Biology: The study of life Science and Philosophy The ‘Scientific Method’ Biology’s Unifying Themes
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3 Biology: The study of life What is ‘Life’? Cellular organization Order Sensitivity Growth, development, and reproduction Energy utilization Evolutionary adaptation Homeostasis
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4 Cellular Organization All organisms consist of one or more cells Cells are microscopic Cells are surrounded by a membrane Cells are either Prokaryotic or Eukaryotic
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5 Order Even the simplest cells show complex ordering DNA must replicate for before cell division Genes must be expressed for protein synthesis Cells must respond to external and internal signals
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6 Sensitivity An object that does not respond to any stimuli is not living All organism respond to some stimuli Light Chemicals Temperature Etc…
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7 Growth, development, and reproduction All organisms grow All organisms reproduce All organisms pass on heredity to offspring
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8 Energy Utilization The basic metabolic processes require energy. They are carried out by the use of energy to produce energy for other use within the organism Metabolism is the sum of all chemical processes occurring within a living cell or organism Metabolism = Anabolism + Catabolism Catabolism: Reactions that result in the breakdown of complex molecules into simpler compound, often with the release of energy Anabolism: The biosynthetic or constructive part of metabolism; often requiring the input of energy
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chapt01_lecture - Basic Life Diversity Biology 1510 Wayne...

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