Evolution
What is Evolution?
A scientific theory to compare and connect how a species changes over time.
The hip bones of a dolphin and the tailbone of a human
What are Vestigial Structures?
What is the purpose of evolution?
To show common ancestry between living organisms.
The mechanism of evolution that results from the migration of organisms into a new population or out of a population, changing the gene pool of each population.
Gene Flow
An example of a structure that is homologous to a cat’s paw.
What is a Dog’s paw, human arm, bat wing, whale flipper
The variety of dog and cat breeds that we have today are a product of _________ _____________.
What is Artificial Breeding (Selective Breeding)
What scientist first proposed the theory of evolution?
Charles Darwin
This mechanism of evolution results usually after a drastic decrease in the population size (like being stranded on an island) leaving only those genes present in the remaining individuals in the gene pool.
Genetic Drift Founder Effect
Body parts that share a common function but have a different structure
What is an analogous structure?
What is the definition of Natural Selection?
The survival and reproduction of the organisms that are genetically best fit for their environment
Evolution can only occur if there is genetic ______ in a population.
Genetic Diversity
This mechanism of evolution results when those organisms most fit for an environment survive and reproduce better than others in the population.
Natural Selection
Two organisms share a large amount of similar DNA
Common Ancestor
Name the three types of natural selection.
Directional, Stabilizing and Disruptive
What is a Common Ancestor?
What is a Common Ancestor?Two different organisms are alike, they share this in their bloodline
This mechanism of evolution introduces new genes into the gene pool which results in increased genetic variability and new traits present in the population.
Mutations
What does embryology tell us when, the embryos are very similar to each other.
Organisms share DNA instructions for development.