Organization_of_life.doc tb

Organization_of_life.doc tb - J. Voltzow Biol. 141...

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J. Voltzow Biol. 141 Organization of Life <TB> Hierarchical organization of life Atoms Smallest unit of matter that still retains the properties of an element Molecules A chemical structure consisting of 2 or more small chemical units (atoms) Ex: Chlorophyll pigment molecule that makes a maple leaf green o Absorbs sunlight during photosynthesis organized into the equipment that converts light energy to the chemical energy Organelles Various functional components that make up cells Ex: chloroplasts Cells Life’s fundamental unit of structure and function Plants & animals = multicellular Human body: muscle cells, nerve cells- organized into the various specialized tissues Special place as the lowest level of organization can perform all activities req. for life Activities of organisms = based on the activities of cells o Ex: division of cells form new cells = the basis for all reproduction & growth and repair of multicellular organisms o Ex: movement of your eyes as you read
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This note was uploaded on 07/29/2011 for the course BIO 141 taught by Professor Voltzow during the Fall '10 term at Scranton.

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Organization_of_life.doc tb - J. Voltzow Biol. 141...

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