Presentation on theme: "EVOLUTION POWERPOINT DIVERGENT AND CONVERGENT EVOLUTION BY: SHAH BAIG."— Presentation transcript:
EVOLUTION POWERPOINT DIVERGENT AND CONVERGENT EVOLUTION BY: SHAH BAIG
Evolution Change in inherited traits from generation-to-generation Driven by natural selection, genetic drift.
Microevolution Occurrence of small changes in populations. Convergent Evolution similar environments distantly related
Sparrow example of Microevolution Sparrows located in the north are larger-bodied. Larger bodied sparrows can survive in colder weather
Macroevolution Evolution over long periods of time Divergent Evolution, two species become dissimilar.
Example of Divergent Evolution Kit Fox and Red Fox. Red Lives in forests Kit Lives in desert Coats help disguise them in surroundings
Conclusion 5 premises of Darwin. Organisms compete to survive Organisms within populations vary. Some variation enhances survivability Organisms with benefits survive Features spread through generations
Natural Selection Natural Selection is a basic part of evolution, accompanied with migration, genetic drift, and mutation. There is a variation in traits. Charles Darwin first noticed this with birds on the Galapagos Islands. The birds beaks well equipped to eat cactus got more food, which allowed them to be in better condition when they mate. The birds with beaks better equipped to eating seeds, and drinking nectar from flowers had an advantage there.