하우 투 비 싱글 풀버전

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감상평 1
accomplish or express them differs to some extent from one organism to another.  여기까지~답변해주시면 추가내공드려요 하우 투 비 싱글   What is life? The structure of living organisms is extre mely compiex. This structure can be examined at various levels of complexity : systems > organs > tissues > cells > subcellular > macromolecules >atoms. The organization of living matter is dynamic : There is a continuous exchange of moleculeas between the parts of the organism and between the organism and its surroundings. This exchange is called metabolism. The synthesis of complex substances from simplerones is called anabolism.The breakdown of complex substances into simpler ones is called catabolism. Living things hanve the capacity to duplicate their unique structures. This may lead to growth of the organism and/or the formation of new individuals, i.e., reproduction. ln asexual reproduction, new individuals are formed by a single parent. These individuals have the same characteristics as their parent. In wexual reproduction, two parents contribute genes to their offspring : consequently their offspring may have traits different from either parent .   Living things respond to certain kinds of changes in their surroundings which act as stimuli. Responsiveness depends on a coordination of the activities of the parts of the organism. In the more complex organisms, this coordination is achieved by hormones ( in plants and animals) and by nerves and muscles ( in animals only ). Over the course of time, the characteristics of living organisms are molded by the forces of evolution .Traits that enhance survival under existing conditions will become more common at the expense of traits that make the organisms less adapted to those conditions. A single kind of organism (species) may leave descendants comprising two or more distinct species . These, then, are the major characteristics of living things .Although all share them, how they
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