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Unformatted text preview: 1.1 A living organism is distinguished from an inanimate object b the presence of a combination of characteristics An organism is organized as structures of increasing size and complexity, from molecules, to cells, to tissues, organs, and organ systems, to individuals, populations, communities, ecosystems and the biosphere Emergent properties arise as the level or organization of life increases and are the consequence of chemical and physical laws Metabolism utilizes energy to support homeostasis. Energy to fuel metabolism comes from the sun or other organisms. Life requires energy to maintain its organization and functions. Metabolism directs the acquisition and use of energy. Organisms must maintain an internal constancy in the face of changing environmental conditions; a state called homeostasis. 1.2 A species is a group of organisms that can successfully reproduce through several generations. Organisms use a variety of approaches to reproduction. Asexual reproduction maintains genetic information; sexual reproduction introduces new genetic changesreproduction....
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- Spring '08