1. The natural changes occuring is explained through the theories of evolution as proposed by  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation and  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation.
2.Lamarck’s  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation and  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation theory states that if an organ is used constantly, the organ develops well and gets strengthened.
3. The degenerated wing of Kiwi is an example for  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation.
4.. The characters developed by the animals during their life time, in response to the environmental changes are called  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation characters.
5.Darwin published his observations and conclusions under the name ‘ acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation’ .
6.The occurrence of variation is a characteristic feature of all  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation and  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation .
7.According to Darwin favourable variations are  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation to the organism and unfavourable variations are  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation or useless to the organism.
8. acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation is the difference found among individuals of the same species and the offspring of the same parent.
9.Discontinuous variation form the basis for Mutation theory proposed by  acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation.
10. acquiredanimalsDarwinDe VriesdisuseFossilharmfulLamarckorgan of disuseOrigin of speciesplantsuseusefulVariation plants give a historical approach to plant kingdom