Question

Define natural selection and describe it’s consequences.

Answer 1

Natural selection is the process that results in the adaptation of an organism to its environment by means of selectively reproducing changes in its genotype, or genetic constitution.

Cosequences of Natural Selection

1. Evolution often occurs as a consequence of natural selection
2. Natural selection may arise from differences in survival, in fertility, in rate of development, in mating success, or in any other aspect of the life cycle.
3. All such differences result in natural selection to the extent that they affect the number of progeny an organism leaves.
4. Natural selection moderates the disorganizing effects of factors that disturb the natural equilibrium of gene frequencies include mutation, migration (or gene flow), random genetic drift etc.
5. Natural selection enhances the preservation of a group of organisms that are best adjusted to the physical and biological conditions of their environment and may also result in their improvement in certain cases.