Chapter 10Where did we come from? (from an evolutionist perspective)

Biological Evolution

Change in the characteristics of a biological population that occurs over the course of generations Inherited genes, Not factors dealing with temporary changes in the environment Not behavioral Ex. Antibiotic Resistance

Natural Selection

Microevolution (not debatable): changes that occur within a population

Macroevolution (debatable): changes that result in the origin of new species

Theory of Common Descent

The Theory of Common Descent states that all organisms originated from a common ancestor

Darwin & the Theory of Evolution

https://www.youtube.com/watch?v=0SCjhI86grU

The observations that Charles Darwin found provided evolutionists with evidence of Biogeography

Evidence of Evolution

Homologies

Embryonic Development

Biogeography

The Fossil Record

https://www.youtube.com/watch?v=GhHOjC4oxh8

Homologies: studying similarities

Anatomical Homology: comparison of similar anatomy in different species Ex. Mammal

forelimbs Vestigial Traits -

Traits without a function but had a function in a species evolutionary history

Molecular Homology Molecular Homology: comparison of similar genes in

different species

Embryonic Development

Developmental Homology: similarities in the process of development from fertilized egg to adult organism Early embryos of different

species look similar Ex. Those with spinal cords

share traits as embryos Pharyngeal slits & tails

Biogeography

Distribution of the species of Earth

Darwin observed species that were unique to each island but had minor differences

The Fossil Record

Fossils: remains of living organisms left in soil or rock

Collections of fossils form a record of ancient life

Evidence Validity

Is this sufficient evidence to support common ancestry and the macroevolution? Is there bias in science textbooks? Is there scientific evidence against evolution? Are there possible explanations for the appearance of

these evidences?