Vocabulary to know
Prezygotic/Postzygotic barriers
Types of Speciation
Extinction
Patterns of Speciation
100
A group of organisms capable of interbreeding and producing offspring
Species
100
Barriers that include different courtship behaviors
Behavioral
100
When populations are geographically isolated
Allopatric
100
What is extinction?
Permanent loss of all of a species
100
What is gradualism
Slow continuous changes
200
Process of forming new species
Speciation
200
Barrier that is when two species mate at different times of the year/day
Temporal Isolation
200
When populations are not geographically isolated
Sympatric
200
How many species die in a mass extinction?
50%
200
What is punctuated equilibrium?
Rapid sudden changes
300
Barriers to successful mating before zygotic formation
Prezygotic
300
Barrier where two species gametes cannot fertilize each other
gametic isolation
300
When a rabbit population crosses a river and becomes a new species
Allopatric
300
How much of all life that have ever lived on earth is now extinct?
99%
300
What is this?
Punctuated equilibrium
400
Barriers to successful mating after zygotic formation
Postzygotic
400
When two species will never meet in the wild
Habitat isolation
400
When a group of flies decides they like apple trees instead of Hawthorns and don't mate with Hawthorn flies anymore
Sympatric
400
When was the last mass extinction?
65 million years ago
400
What is this?
Gradualism
500
What organism is an example of a postzygotic barrier?
Mules
500
How many chromosomes does a mule have and why is it a problem?
63 and they don't pair up because it is an odd number causing infertility
500
What is a theory on what causes mass extinctions?
Meteor strike or volcanic eruptions.