What is random mating, no mutations, large population, no gene flow, no genetic drift and no natural selection
100
The three types of selection distributions are...
What is stabilizing, disruptive and directional
100
4.5 billion years old
What is the age of the earth?
100
Number of mass extinctions on earth.
What is 5?
200
Separation of populations by barriers such as rivers, mountains or bodies of water
What is geographical isolation
200
All genes of all members of a population make up it's
What is gene pool
200
When individuals at one end form a bell curve have high fitness this is a type of ______________ selection
What is directional?
200
Put oxygen into the atmosphere.
What are cyanobacteria?
200
Genetic drift occurs in very (large/small) populations...
What is small populations?
300
Factor necessary for formation of new species
What is reproductive isolation
300
If an allele makes up one fourth of the population's alleles then it's frequency is...
What is 25 percent or .25
300
When individuals with an average form of a trait have the highest fitness the result is ______________ selection.
What is stabilizing?
300
Descend from cyanobacteria.
What are eukaryotes?
300
Type of genetic drift that follows the colonization of a new habitat by a small group of individuals.
What is founders effect?
400
Galapagos finch species is an example of
What is speciation
400
In a population the sum of all allelic frequencie in a population must be...
What is 1 or 100%
400
If a mutation introduces a new skin color in a lizard population, this factor might determine whether the frequency of the new allele will increase...
What is whether the mutation makes some lizards more fit for their environment than other lizards?
400
Evolution of chloroplasts and mitochondria.
What is endosymbiosis?
400
Totally random chance events (earthquake, storm) that changes the allelic frequencies of a small population.
What is genetic drift?
500
Geographic isolation of two populations increases difference in gene pools because....
What is prevents interbreeding between the populations
500
A situation where allelic frequencies of a population remain the same is...
What is equilibrium?
500
In a population of finches in which one group of birds has a short, parrotlike beak and another group has a long, narrow beak, the type of selection is...
What is disruptive?
500
Invaded smaller cells that are now mitochondria and chloroplasts.