Human Origins Ch.5 Flashcards
Life was created by Intelligent beings but also able to evolve from one form to another.
Intelligent Design Theory
Life was existed by natural process. Once a species arose, it would change constantly by natural force known, through favorable conditions or various challenges.
* Charles Darwin
Natural Selection
Ideas of “ the survival of the fittest” is not by Charles Darwin but by a Sociologist (?) who stole Darwin’s evolutionary idea.
Herbert Spencer
Mechanism for natural selection
Mutation
Gene migration
Gene Drift
Changes in genetic levels ( happens all the time and never noticed.) Most mutations are harmful and dangerous but rarely become positive forces for changes.
Mutations
A new set of genes come from a different area and mixes with old population to creat a new population.
Gene Migration
When a size of a population is too small, there are reductions of variety, hence, everyone shares some genes
- where the ultimate home of the two legged creatures including humans
Gene Drift
Developed to protect our body from sun light ( ultra violet ray). Melanin is a chemical to protect our skin from U.V. Ray to course skin cancer.
Dark Skin
Developed to observe sun light to produced Vitamin D which is essential for the growth.
Light Skin
A group of related organisms that can “ Interbreed” and “produced” fertile offsprings
Species
Walking with two leg/using two legs to move around
Bipedalism
Types of adaptation
Genetic adaptation
Developmental adaptation
Cultural adaptation
Acclimatization
Changes in genetic levels ( can happen to any species )
Genetic adaptation
Animal growth and development can be influenced by non-genetic factors such as nutrition,diseases and social stresses
Developmental adaptation
Temporary adjustment in bodies of all species to environment
Cultural adaptation