Inborn fixed pattern of behavior

Behavior-controlling mechanisms have appeared during evolution to enable organisms to react adaptively to the widening spectrum of stimuli coming from their surroundings. An inborn fixed pattern of behavior is the simplest mechanism. Some inborn fixed patters of behavior activate autonomously during the individual’s ontogeny  -and life cycle, independent of the environment. They are activated without any external stimulus and their form and starting point are programmed genetically. In many cases, the neural system is not required for their coordination. This kind of behavior often occurs in plants, where it is accompanied or mediated by growth; it most probably also controls the embryogenesis of most organisms.

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The classical Darwinian theory of evolution can explain the evolution of adaptive traits only in asexual organisms. The frozen plasticity theory is much more general: It can also explain the origin and evolution of adaptive traits in both asexual and sexual organisms Read more