Wednesday, May 27, 2009

Cumulative Selection

Cumulative selection is the accumulation of many small evolutionary changes over long periods of time and also through many generations. This relatively new type of selection is a significant and important adaptation compared to ancestral species. Kin Selection is the natural selection of an organism based on a particular behaviour or trait that enhances the overall quality of life for any closely related individuals. This increases the fitness of the particular individual indirectly.

Over a period of time, an organism slowly develops adaptations/features through silent mutations or many small evolutionary changes. These changes may assist them in their current environment. From figure a to figure d, an area of light sensitive cells are formed into a lens. This is a result of prolonged exposure to light.

Return to Types of Selection.

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