AP BIOLOGY

Detailed explanation-1: -struggle for existence in American English noun. the competition in nature among organisms of a population to maintain themselves in a given environment and to survive to reproduce others of their kind.

Detailed explanation-2: -Competition for limiting resources is among the most fundamental ecological interactions and has long been considered a key driver of species coexistence and biodiversity. Species’ minimum resource requirements, their R*s, are key traits that link individual physiological demands to the outcome of competition.

Detailed explanation-3: -In On the Origin of Species, Darwin claimed that there was a continual ‘struggle for existence’ in nature, in which only the fittest would survive. This theory came partly from his reading of Thomas Malthus’s Essay on the Principle of Population.

Detailed explanation-4: -These included “dependence of one being on another, ” animals that “struggle with each other” over limited food resources, plants that “struggle for life against the drought” and that “struggle with other fruit-bearing plants, in order to tempt birds to devour and thus disseminate its seeds.”