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Biology - encyclopedia article about Biology. (4283 words) |
 | While biology is unlike physics in that it does not usually describe biological systems in terms of objects which obey immutable physical laws described by mathematics, it is nevertheless characterized by several major principles and concepts which include: universality, evolution, diversity, continuity, homeostasis and interactions. |
| For example evolutionary biology leans heavily on techniques from molecular biology to determine DNA sequences which assist in understanding the genetic variation of a population; and physiology borrows extensively from cell biology in describing the function of organ systems. |
| Cell biology studies the physiological properties of cells, as well as their behaviors, interactions, and environment; this is done both on a microscopic and molecular level. |
| Tribe - Wikipedia, the free encyclopedia (569 words) |
| In the popular imagination, tribes reflect a way of life that predates, and is more "natural", than that in modern states. |
| Thus, many believed that tribes organize links between families (including clans and lineages), and provide them with a social and ideological basis for solidarity that is in some way more limited than that of an "ethnic group" or of a "nation". |
| He concluded that tribes in general are characterized by fluid boundaries and heterogeneity, are not parochial, and are dynamic. |
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