DIFFERENTIATION

in biology, series of changes that occur in cells and tissues during development, resulting in their specialization. This, in turn, permits a greater variety of organisms. In plants, unspecialized cells, composing tissue called meristem, differentiate into vascular tissue (xylem and phloem; see wood), supportive tissue (sclerenchyma), and storage tissue (parenchyma). In animals, the tissues of the gastrula stage of the embryo differentiate into specialized tissues. While it is not fully understood what initiates this processs, it is known that each of the specialized cells in an organism carries a full set of genes, with all of the organism's genetic information, but each specialized cell expresses only part of it. That is, each cell only transcribes that DNA that it needs to do its specific tasks (see nucleic acid).

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Differentiation
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books on: Differentiation  - 29143 results

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...the determinants of socioeconomic differentiation versus those who seek to understand...documents temporal changes in the income differentiation between men and women in the United...latter fundamental causes of social differentiation and social stratification or merely...
...instructional planning. Gender-based differentiation-It is likely that there are predominantly...ways. The goal of gen- der-based differentiation, then, is to understand the range...within each gender. Gender- based differentiation is one facet of learning profile differentiation...
...instructional planning. Gender-based differentiation-It is likely that there are predominantly...ways. The goal of gender- based differentiation, then, is to understand the range...tion is one facet of learning profile differentiation. Generalization-A generalization...
...in the pouch at a stage when sexual differentiation was already initiated and he studied...development occurred Moore, 1941 . Differentiation of the uterus of castrated females...doubt the hormonal theory of sexual differentiation. Wells and his associates studied...
...this increasingly difficult because it permits greater differentiation of cultures and sub-cultures and threatens effective...similar products. But nonetheless there has been a major differentiation of provision of cuisine type, quality of food and nature...
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journal articles on: Differentiation  - 14331 results

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Arsenic Inhibits Myogenic Differentiation and Muscle Regeneration. by...related to effects on myogenic differentiation. OBJECTIVE: We investigated...2O.sub.3 on the myogenic differentiation of myoblasts in vitro and muscle...
Differentiation of Self and Christian Spiritual...D. Majerus , Steven J. Sandage Differentiation of Self (DoS) is a social science...forms of relational spirituality. Differentiation of Self (DoS) represents another...
Evidence concerning the Importance of Perceived Brand Differentiation by Jenni Romaniuk , Byron Sharp , Andrew Ehrenberg Brand Differentiation: the marketing tenet Differentiation is regarded as one of the core principles of marketing theory...
...Peer Coaching to Improve Classroom Differentiation: Perspectives from Project CLUE...number (Landrum, 2001), classroom differentiation is becoming more essential for general...2006; Tieso, 2004). Classroom differentiation is necessary to enable all students...
...Middle School Teachers Responses to Differentiation. by Holly L. Hertberg-Davis...instruction and principals attitudes toward differentiation is unknown. In this qualitative study...NMSA/NAGC, 2005, n.p.). Differentiation, according to Tomlinson (2001...
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magazine articles on: Differentiation  - 2084 results

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Differentiation through Selling, Not Branding by...image of the brand in question. Differentiation is a function of branding and of...Sterling? Do the same rules of differentiation apply when it comes to sellers of...
...Manufacturings Search for Competitive Differentiation by Robert Angel Canadian manufacturers...operations too, meaning that strategic differentiation is really what earns a competitive...Planning. Another example of value chain differentiation is Engineered Assemblies. It brings...
Design Differentiation for Global Companies: Value Exporters and Value Collectors by Clive Grinyer Travel internationally and you will find that despite...
Differentiation in Diverse Settings: A Consultants...careful study, a need to support differentiation in the regular classroom as one...more comfortable and competent with differentiation. The director talked with principals...
Staff Development for Differentiation Must Be Made to Measure by Kelly...differences - that they model the differentiation teachers will practice in the...strategy), high-quality differentiation necessitates that teachers understand...
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newspaper articles on: Differentiation  - 538 results

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Furniture Industry Needs Differentiation Strategy. Design innovation...manufacturers have to adopt a Focus-Differentiation strategy that will concentrate...advised to consider a Focus-Differentiation strategy for the global market...
...Service Organisations in the North East That Have Demonstrable Strength in Terms of Service Excellence, Service Differentiation, Business Growth and Innovation. WINNER DURHAM WEARSIDE Waterstons, Durham THE Durham City-based IT and business...
...Chain: Basis for Cost Leadership and Differentiation Within an industry, an organization...advantage through cost leadership and differentiation. An organization must exploit all...frills offerings. An advantage through differentiation requires finding a niche in the industry...
...Mr. Cheng hopes to find the answer in Eros differentiation. Differentiation, he explained, is caused when a planet...sinking, and the lightest rising. Significant differentiation would imply that Eros was once part of a planet...
...SMEs as to the large corporates. Real differentiation is essential if your target audience...them to build customer loyalty. But, differentiation of itself is not enough. Differentiation must have relevance to the target audience...
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encyclopedia articles on: Differentiation  - 27 results

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DIFFERENTIATION in biology, series of changes that occur in cells and tissues during development, resulting in their specialization. This...
...evolution for all races and that racial differentiation occurred relatively late in the history...the very early emergence of racial differentiation have been advanced (e.g., C...Cavalli-Sforza, The Origin and Differentiation of Human Races (1972); S. J...
...The calculus and its basic tools of differentiation and integration serve as the foundation...derivative of y = f(x) is called differentiation. The derivative dy / dx = df(x...partial derivatives. In any partial differentiation all independent variables other than...
...increasingly hierarchical, with increasing differentiations of wealth and status, shown primarily...characterized by its own internal differentiation of status and power. While much earlier...Mexico, urbanization and occupational differentiation in the Mayan region were poorly developed...
...the question of what makes the embryo differentiate (see differentiation ), what genetically directed molecular signals tell a...higher plants, the divisions of the fertilized ovum and the differentiation of the tissues to form the embryonic root (hypocotyl...
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