Natural Selection
Most populations have more offspring than can survive
What is Gene flow?
The movement of genes between populations
What is Variation?
What are Cladograms?
Shows the evolutionary relationship between 2 species
What is Fossil Evidence?
Preserved remains of past life
What are acquired traits?
Traits that are developed, the can't be passed down because they aren't coded for in DNA
Name 2 things that evolution causes
If correct they may receive points
What are the 2 sources of Variation?
Mutations and sexual reproduction
If the branches are close
The 2 species are closely related
What are fossils?
Fossils are preserved remains or traces of ancient organisms
Define Adaption
Trait that has allowed an organism to better survive in its enviornment
What is Evolution?
Process by which species change over time
How does meiosis connect to variation
During Meiosis, recombination of genes occurs that allows for new arrangement of genes. This creates variation
A species from which another species evolved from
What are paleontologists?
A scientist who studies fossils to learn about the history of life on earth
What is Competition?
There's a struggle for survival within a population for organisms to survive
How does evolution work with natural selection?
Evolution can or cannot give organisms the required traits to best survive in the environment
What does Mutation cause?
Random changes in DNA coding
If a specie is farther down on a cladogram, what does that mean?
It is older
What is relative dating?
Fossils are dated from old to young based on their rock layer
Name the Darwin's Process
Variation
Overproduction
Competition
Define Common Ancestry
All life on earth comes from a common ancestor
How does Natural Selection connect to Variation?
In order for natural selection to occur, there must be Variation within the population that allows some individuals to be better suited for the environment
What if a branch breaks off from the other branches?
It went extinct
Alfred Wegener's fossil evidence
That the continents were once joined