Disruptive selection is a way of natural selection where extreme phenotype gets selected by the nature. Whenever there is sudden change in the environment, it creates sudden forces which favors the selection of extreme phenotype. In simple terms rather than having one ideal phenotype as observed in stabilized environment nature selects different types in the changing environment.
This is because disruptive environments
favor disruptive
natural selection that favors the
extremes traits in a population. The variance of the trait increases and the
population is divided into two distinct groups on both extremities. The attached picture will show how disruptive selection
is modeled.
If the water concentration inside the cell is higher then that of the medium (i.e. the medium is hypertonic solution) the number of water molecules diffusing out will be more than that entering and the cell will shrink and shrivel due to osmosis.
