You'll find sagging floors primarily on poorly constructed homes, raised framed foundations or on homes built before the late-1940s post-war boom. With age or termites, support joists can weaken or posts sink into the ground, especially when only supported by a pile of rocks or bricks.
âº a gradual process of change and development. âº biology Evolution is the process by which the physical characteristics of types of creatures change over time, new types of creatures develop, and others disappear. (Definition of âevolutionâ from the Cambridge Academic Content Dictionary Â© Cambridge University Press)
Ch. 22, 23, 24, 25, 26, 27.1-27.2 (p. 452-564) evolution. Descent with modification; the idea that living species are descendants of ancestral species that were different from the present-day ones; also defined more narrowly as the change in the genetic composition of a population from generation to generation. (p. 452) fossil.