Biological Evolution and The Darwinian Thoery

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Biological Evolution and The Darwinian Thoery

Evolution and the scientific process

Test of Hypothesis: Studying fossils and comparitive morphology

Communication to other scientists: the publishment of darwin's ideas

Explaination (Hypothesis): " All animals belonging to the same group have common ancestor

Observation:The classification of species in similar groups

Darwin's misconceptions

Evolution and religion is incompatibale

many scientists who are devoutly religious believe in evolution

Evolution is not scientific

it is testable and observable and thus scientific

Fossil record not complete

Fossilazation is a rare event

It is a theory about the origins of life

Darwin was concerned about the way life changed after creation

Evolution is a "ladder of progress"

there is no ladder, it is a continous progress

Men has evolved from apes and monkies

Man, apes and monkies have same ancestor

Darwin ideas

His Ideas

Like Newton, he formulated a theory that changed people's perspective in a more fruitfula way

Natural selection: nature select those individuals best suited for the environment

it is a process of interaction bet. change, variation,Competition and excess

many diffrences are inherited and can be passed on to offspring

individual members are not identical but vary

Darwin and Wallace proposed the missing mechanism

Darwin's Journey

he also noticed that they varied from one island to another

Darwin noticed the Finches and the variation of their beaks

Darwin's Challenges

Mendel: anserwed the question be saying that organisms acquired through genes

Challenging question to Darwin

What is the ultimate source of variation?

Speculations about the origins of life

these ideas were not able to propose a good mechnism to explain how organisms vary

Greeks

evolution has created the world's orgnic coherence from a formless condition

Genesis

God created life in six days

christian theologians

earth has power to produce organisms