vocab
A layer where the oldest one is on the bottom and the newest one is on the top (Think rock layers)
What is strata?
Species develop traits that help them survive in their environment
What is adaptation?
The layers and objects in the layers tell you approximately how old something is compared to others.
What is Strata and Fossil record?
Differences in DNA in individuals of the same species
What is genetic variation?
Does natural selection grant organism what they "need"?
NO! NO LAMARKIANS OVER HERE
A structure in an animal's body that was useful to its ancestors, but useless nowadays
What is a vestigial structure?
differences between species
What is variation?
Genetic variation across geography
What is Biogeography?
More babies born than can survive
What is Overproduction of offspring?
Fill in the blank:
Individuals don't evolve, ______ evolve.
What is Population?
Similar structures in animals that came from a common ancestor
What is a homologous structure?
a group of animals with similar DNA structures
What is a species?
evaluating similar structures (molecular make-up, DNA, or embryology) in different species
What is comparative anatomy?
struggle is real... orgs fight to survive "selective pressure", things that force an organism to survive
What is struggle for existence?
group of organisms of the same species living together in the same area
What is population?
The change in a species structure over a period of time
What is evolution?
Something that forces the selection of the fittest trait
What is a selection factor?
Similarities among species reflected in their molecules, genes, & proteins
What is molecular homology?
Some traits are better than others at survival and reproduction than others
What is differential survival and reproduction?
Reveals anatomical homologies not visible in adult organisms
What is comparative embryology?
Survival of the fittest where the fittest survive in their environment, leaving the fit species to reproduce more with the advantageous gene
What is natural selection?
A random change in a DNA sequence
What is mutation?
Evolution can be observed within our lifetime! (Darwin and his finches)
What is Direct Observation?
Change over time to develop a beneficial trait
What is evolution of adaptations?
How many letters do these sequences differ by?
CCCAATGG
CTCAAAGG
2