Biological Evolution (What is Evolution? (Evolution is a change in a…
What is Evolution?
Evolution is a change in a species over time
Conditions for Evolution to occur
A variation in traits
A selective force
A selective force is something in an environment that makes some traits favorable and some unfavorable
Favorable traits increase fitness
Unfavorable Traits decrease fitness
Unequal Reproduction between organisms
Evolution is a change in the genome of a species over time
Genes ("code of life"
Phenotypes, physical traits
Genotypes, genetic traits
Punnet squares show probability of inheritance of traits.
Dominant and recessive traits
Natural selection (attempts to) increase the fitness of a species over time
Fitness is the ability of a species to survive and reproduce in an enviroment.
Types of evolution
The environment is the selective force
Humans are the selective force
Evidence for Evolution
Fossils across continents "link up" to show how continents drifted apart over time
These fossils come from the same species but have differences in traits
Finches in the Galapagos
Darwin devised his theory of evolution while in the Galapagos
Finches have different beak shapes and sizes
Traveled in the HMS Beagle
Wrote the book, "The Origin of Species"
Alfred Wallace was going to release his book that devised an extremely similar theory, Darwin published before him
The History of Evolutionary Thought
Misconceptions about Evolution