chapter 10 where did we come from? (from an evolutionist perspective)
TRANSCRIPT
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?