A random change in genetic frequencies, usually occurs in small populations.
study of the structures of organisms.
study of the DNA/Protiens of organisms.
study of the embryos of organisms.
What was the main difference between the different species of finches on the Galapagos Islands?
Fossils found in the UPPER layer of the sedimentary rock are ________(older/younger) than those found in the lower layers.
choosing the best of a species to reproduce offspring.
Hydrogen cyanide, Carbon dioxide, Carbon Monoxide. and Hydrogen sulfide water
What was the primative Earth atmosphere composed of?
Organs that have no function.
frozen in ice, covered in amber, sand, or clay that turns to rock
Name 3 ways that remains of organisms can be preserved as fossils.
when unrelated organisms independently evolve similarities.
the first organisms were probably_______.
where did the first organsims evolve?
organisms cannot interbreed.
squirrels separated by a canyon.
plants reproduce at different times.
birds have different mating rituals.
On the origin of species
combined genetic info of all members of a population.
relative frequency of an allele
number of times an allele occurs in a gene pool.
Mutations and gene shuffling
what are the two main functions of genetic variation?
directional, stabalizing, and disruptive
what are the three main types of selection?
shifted to one side.
eliminates sides, increasing middle.
how did darwins finches undergo speciation?
The allele frequencies remain constant unless one or more factors cause change.
to verify evolution
why was the Hardy-Weinberg principle developed?
Mutation, gene input, random mating, large population, no selection
Name the 5 conditions of the Hardy-Weinberg principle that if met evolution will not occur.
helps an organism survive in a particular climate.
A body structure that helps an organism survive and reproduce.
adaptation that involves a body part's job of controlling a life process.