Question

explain drawin theory of evolution

Answer 1

harles Darwin is renowned in many countries across the globe as the man who developed the Theory of Evolution. His theory sets about explaining the progressive changes that occur within species down the generations, as well as the formation of new species, when environmental pressures have differential effects on the reproductive success of all individuals.

Darwin's theory has two aspects to it, namely Natural Selection and Adaptation, that work together to shape the inheritance of alleles (forms of a gene) within a given population. Darwin made the following five undamental observations, from which three inferences can be drawn.

Darwin's observations

• All species have such great potential fertility that their population size would increase exponentially if all individuals that are born go on to reproduce successfully.
• Populations tend to remain stable in size, except for seasonal fluctuations.
• Environmental resources for things such as food and shelter are limited.
• Individuals of a population vary extensively in their characteristics (to the extent that no two individuals are exactly alike) which impacts upon their own ability to survive and reproduce.
• Much of this variation is genetic and is therefore heritable.
• Inferences drawn from observations