Question

What do you understand by the term natural selection? Write Darwin’s theory of evolution.

Answer 1

Evolution by natural selection is a hypothesis supported by evidence in a broad range of scientific fields, including geology, paleontology, genetics and developmental biology, which have been better supported in the history of science.

Complete Answer:
- Evolution reflects changes over the coming generations in the heritage features in biological populations. These are the expressions of the genes which are transmitted during replication from parent to descendant. There are many features of genetic recombination, mutation, and other causes of genetic variation within a given population.
- Evolution takes place as evolutionary mechanisms such as natural and genetic mutation operate upon this variation, which contribute to certain features being more common or scarce in a population.
- Natural selection ensures that species that have a beneficial variety will survive, so they adapt to changes in their environment while unsuitable species are lost or killed in nature (which do not adapt to the environment).
- The theory of natural selection was offered by Darwin in 1839. According to his hypothesis, only species that have favourable improvements to respond to the environmental or population circumstances around will thrive as a fight for survival.
- Simply stated, the battle for life leads to the survival of the strongest, and that is why natural selection chooses the more environmentally fit species and produces the offspring.

Note: The differential survival and reproduction of organisms because of phenotype variations is a natural selection. The transition in the heritage features of the population over centuries is one main process of evolution. The principle of evolution was first proposed by Darwin in 1839.