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Definition of Evolution
Mechanisms of Evolution
Evidences of Evolution
– the change in a living population over time.
Modern Theory of Evolution Religion vs Science Early Concepts Lamarck's Concept
Special Creation Theory
The Theory of Evolution
Special Creation Theory
All species were made by a supreme being during creation and that they have changed little since then .
Theory of Evolution
Evolutionists maintain that present-day species have developed from simpler, more primitive organisms that existed millions of years ago.
Early Concepts of Evolution
Aristotle The nature evolved gradually from the simple to the more complex and from the imperfect to the perfect
He wrote an evolutionary explanation of the origin of plants and animals.
Leonardo da Vinci
THEORY OF CATASTROPHISM
The fossil found in the rocks resulted from a succession of fires and flood
sedimentary deposits was due to geological forces of erosion
Lamarck's Concept of Evolution
He believed that once organisms have become adapted to their environment, the traits that they have acquired are transmitted to the next generation.
Father of the Modern Theory of Evolution proposed that evolution is brought about by natural selection.
Natural selection is the process by which organisms with traits suited to an environment, or favorable traits, have a better chance of surviving and reproducing than those that are not suited.
It is the struggle for existence and the survival of the fittest
Evidences of Evolution Fossils DNA Coding Comparisons
(from Latin fossus , literally "having been dug up")
- are the preserved remains
that had lived in the past.
Three small ammonite fossils, each approximately 1.5 cm across.
Petrified wood . The internal structure of the tree and bark are maintained in the permineralization process.
Eocene fossil fish Priscacara liops from Green Riv e r Formation of Utah
To determine whether the species have evolved from a common ancestor, it is logical to look for similarities among the species
Comparative anatomy is the study of similarities and differences in the anatomy of organisms.
Comparative biochemistry or biochemical evolution is the study of differences in chemical (metabolic) processes among species . For example, the difference between carnivorous species of animals and herbivores is included in comparative biochemistry.