Lecture 1 - What Is Life 11 Living things are Organized...

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2/23/11 What Is Life? 11
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2/23/11 Biosphere All regions of Earth’s crust, waters, and atmosphere that sustain life Ecosystem Group of communities interacting with their shared physical environment Community Populations of all species that occupy the same area Population Group of individuals of the same kind (that is, the same species) that occupy the same area *Multicellular Organism Individual consisting of interdependent cells *Cell Smallest unit with the capacity to live and reproduce, independently or as part of a multi-cellular organism Living things are Organized - Hierarchical organization 22
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2/23/11 33 Multicellular organism - Individual consisting of interdependent cells - Specific body plan/ pattern Living things are Organized
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2/23/11 Ce ll - Basic unit of life - Smallest unit with the capacity to live and reproduce, independently or as part of a multi- cellular organism 44 Living things are Organized
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2/23/11 Populations of living things change from one generation to the next = Evolve 55
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2/23/11 Living things contain DNA = hereditary info Information Flow 66
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2/23/11 Living things reproduce Sexual reproduction Asexual reproduction ~ 22 months ~ 6 hours 77
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2/23/11 e. Adult a. Egg b. Larva c. Pupa d. Emerging adult Living things grow and develop Life Cycle 88
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2/23/11 Oxyge n Cellular respiration releases chemical energy from sugar molecules. Electromagne tic energy in sunlight Photosynthesis captures electromagnetic energy from sunlight. Energy is stored as chemical energy. Suga r Carbon dioxide Wate an d Oxyge n Living things process energy = Metabolism AT P available for cellular work 99
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2/23/11 Living things maintain internal environments = Homeostasis Example: panting to maintain body T 1010 Example: transporters/carriers to maintain cellular ion concentrations
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2/23/11 Cell - Basic unit of life - Smallest unit with the capacity to live and reproduce, independently or as part of a multi- cellular organism Living things contain one or more Cells
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2/23/11 Characteristics of Living Things - Summary Organization Evolution of populations DNA Reproduction Growth/development Response to environment Metabolism
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This note was uploaded on 02/23/2011 for the course BIOL 215 taught by Professor Diiulio during the Fall '07 term at Case Western.

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Lecture 1 - What Is Life 11 Living things are Organized...

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