| Reproductive Barriers | Speciation | Rate of Evolution | The End of the Line | The Coming and Going of Species |
| 10 | 10 | 10 | 10 | 10 |
| 20 | 20 | 20 | 20 | 20 |
| 30 | 30 | 30 | 30 | 30 |
| 40 | 40 | 40 | 40 | 40 |
| 50 | 50 | 50 | 50 | 50 |
| Final Question | ||||
2 types of reproductive barriers
2 types of reproductive barriers
prezygotic and postzygotic
Type of reproductive isolation that occurs as a result of physical or geological separation
Type of reproductive isolation that occurs as a result of physical or geological separation
ecological
Type of reproductive isolation that occurs as a result of the same species living in the same habitat but being active at different times
Type of reproductive isolation that occurs as a result of the same species living in the same habitat but being active at different times
temporal
Type of reproductive isolation that occurs when gametes cannot unite
Type of reproductive isolation that occurs when gametes cannot unite
gametic
Type of reproductive isolation that results in offspring who are unable to produce gametes
Type of reproductive isolation that results in offspring who are unable to produce gametes
hybrid infertility
A distinct type of organism
A distinct type of organism
species
Type of speciation that arises when 2 populations are separated by geographical barrier
Type of speciation that arises when 2 populations are separated by geographical barrier
allopatric
Type of speciation that arises when populations living in the same physical area diverge genetically
Type of speciation that arises when populations living in the same physical area diverge genetically
sympatric
Type of speciation that arise when part of a population migrates to a 'border' regions and reproduces with other 'border' species
Type of speciation that arise when part of a population migrates to a 'border' regions and reproduces with other 'border' species
parapatric
Clarkia in California are an example of sympatric speciation. What caused this speciation?
Clarkia in California are an example of sympatric speciation. What caused this speciation?
A bottleneck event
Has missing links or intermediates
Has missing links or intermediates
fossil record
Idea that evolution proceeds in long periods of stasis followed by short burst of rapid change
Idea that evolution proceeds in long periods of stasis followed by short burst of rapid change
punctuated equilibrium
Idea that says evolution proceeds in small, incremental changes over many years
Idea that says evolution proceeds in small, incremental changes over many years
gradualism
Divergence of multiple new species from a single ancestral type in a relatively short time
Divergence of multiple new species from a single ancestral type in a relatively short time
adaptive radiation
What causes speciation to occur in rapid bursts?
What causes speciation to occur in rapid bursts?
new resources
all members of a species die
all members of a species die
extinction
Give 1 reason why species die
Give 1 reason why species die
loss of habitat, failure to adapt, new predators, disease
Large number of species dissapear over a short period of time
Large number of species dissapear over a short period of time
mass extinction
Gradual loss of species as populations shrink due to challenges
Gradual loss of species as populations shrink due to challenges
background extinction rate
Dramatic environmental changes due to the movement of Earth's crust caused a profound affect on various species
Dramatic environmental changes due to the movement of Earth's crust caused a profound affect on various species
plate tectonic theory
Evolutionary trees
Evolutionary trees
phylogenies
Species relationships in evolutionary trees are based on ___________.
Species relationships in evolutionary trees are based on ___________.
descent from a common ancestor
Discontinuation in an evolutionary tree indicates __________.
Discontinuation in an evolutionary tree indicates __________.
extinction
____________ indicates gradualism or punctuated equilibrium in an evolutionary tree
____________ indicates gradualism or punctuated equilibrium in an evolutionary tree
angle of branch point
What type of data are evolutionary trees based on?
What type of data are evolutionary trees based on?
fossil - originally ; now mitochondrial DNA
What are 3 ways that adaptive radiation can occur?
What are 3 ways that adaptive radiation can occur?
1) Individuals colonizing a new isolated habitat 2) inheriting selective advantage 3) surviving major environmental change
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