Question

how does evolution occur

Answer 1

Dear Student,

Evolution is a huge process. We can define it as a slow change in the body design and other characteristics of an organism or cumulative change that occur in the population over time.
Basis of evolution are accumulation of variations over generations. These variations are due to DNA replication , mutation , recombination during sexual reproduction. The driving force are Natural selection and Genetic drift.
The offsprings shows variation from their parents due to crossing over and exchange of gene segments.

Regards!