Explain the theory of natural selection
Answers
THEORY OF NATURAL SELECTION –
➸ Within any population, there is natural selection.
➸ There are many variations in the individuals.
➸ Even though there is large population, population remains constant because of natural selection.
➸ There is a competition in the members of the same species for different resources.
➸ The fit ones survive and reproduce in this competition.
➸ The favourable variations of the individuals are passed on to the next generation.
➸ These variations accumulated over a long period of time leads in the origin of new species.
ORIGIN OF NEW SPECIES –
➸ Geographical isolation.
➸ Genetic drift.
➸ Variations
NATURAL SELECTION –
Natural selection is the process of evolution of a species where by characteristics which help individual organisms to survive and reproduce are passed on their offsprings, and those characteristics which are of no help are not passed.
Answer:
This theory explains that the survival of individuals among a given species is determined by heritable phenotypic differences that are acquired due to evolution. It states that; the individuals with the best or better suited phenotypic characteristics will survive in the environment.