natural selection vs artificial selection

Beetles with brown genes escaped predation as their colour became one with the environment and they remained as if hidden. In the process they survived to reproduce more frequently than beetles with green genes. This allowed more brown genes to go into the next generation. In another situation an ..

It is a process of selective improvement of a crop. In selection, a plant is selected based on its genotypic and phenotypic characters in order to improve some of its characters in its next generation. Natural selections have occurred in many crops,..

It is primarily a process of differential reproduction. Some members of a population may have genes, which enable them to grow up and reproduce at a higher rate. This results in the formation of offspring having better chances of survival. Those organisms that produce large number of viable offspr..

Zeolites - Shape-Selective Catalysis by Zeolites - Shape-selective catalysis are those reactions that depend on the pore structure of the catalyst and the size of the reactant and product molecules. In such reactions, zeolites are used as catalysts. Zeolites are microporous alum..

Nature of Solid Catalyst - Heterogeneous catalysis is extensively used in chemical industry. Hence, development, selection and application of solid catalysts forms an important area in surface chemistry studies. The nature of the solid catalyst has profound effects on ..

Heterogeneous catalysis is extensively used in chemical industry. Hence, development, selection and application of solid catalysts forms an important area in surface chemistry studies. The nature of the solid catalyst has profound effects on heterogeneous catalytic reactio..

The natural systems of classification of angiosperms have mainly used the floral characteristics as the basis. Some of the earlier attempts in this direction were those of Linnaeus, John Ray, Bentham and Hooker. However, these systems of classification are now termed as non-phylogenetic h..

It refers to the variation of genes within a species. The genetic diversity enables a population to adapt to its environment and to respond to natural selection. The amount of genetic variation is the basis of speciation. Genetic diversity within a species often increases with e..

Variations provide the species a way to survive and adapt to the changing environmental conditions. Since there are variations, nature can choose the best suited individual and allow the species to multiply further. Thus, natural selection is possible only because of v..

Charles Darwin and Alfred Russel Wallace proposed that nature has its own ways of selecting the best from the available species for continuation of life. Darwin became famous for his Theory of evolution by natural selection, the mechanism of which works as f..