Thursday, December 15, 2011

Some laws related to Evolutionary Biology

Dollo's law is a general statement of the irreversibility of evolution that an organism cannot be back to its ancestor's condition.

Cope's law is that the degree of survival of species is directly related to the extent to which the species remains unspecialized and in the main line of evolutionary development and correlatively the extent to which it does not enter into a specialized branch of development.

Gause's law is that two species having the same ecological requirments cannot continue to occupy indefinitely the same habitat.The word indefinitely is important as long as there is enough food for everyone two species may live together.A time will come when there is not enough food for all then one species will supplant the other because it is unlikely that both species will be exactly alike in their efficiency in utilizing the food supply or in more general terms will have exactly the same degree of adaptation to the environmental space shared by both.

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