→ Ideas related to the evolution of living form are based on the observations of Charles Darwin during his voyage around the world in the ocean liner H.M.S. Beagle.
→ Charles Darwin concluded that organisms on Earth not only resembled each other, they also resembled organisms from years ago.
→ Many of these organisms are extinct.
→ Some organisms have become extinct in different periods in the history of the earth, against which some new ones have also appeared.
→ Organisms are evolved gradually. Any population is stable due to variation in traits.
→ Characteristics that some natural situations (air, food, physical elements etc.) enables better survival.
→ This situation tends to leave behind less able organisms.
→ Population that have good fitness can survive on the earth (survival of the fittest rule).
→ According to Darwin fitness means only reproductive fitness.
→ Organisms that are better suited to the environment can produce more offspring than others to survive longer and nature selects them, which Darwin called natural selection.