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)
Evolution is and it is whether  modern  or  ancient.     Evolution is the change in allele frequency over time in a  population of organisms.Change over time.  â¦   The theory that explains much about evolution.volution is and it is whether  modern  or  ancient.     Evolution is the change in allele frequency over time in a  population of organisms.