Flashcards in Chapter 16 Deck (15):
Define a species
Population of breeding organisms that must be able to breed twice
Speciation can occur when two mechanisms are met.these mechanisms are what
Isolation and divergence
What is an excepted category of speciation: sympatric or parapatric
What is the difference between a pre-and post zygotic isolating mechanism
Pre-zygotic is before the egg is fertilized while post zygotic is after the egg is fertilized
What is an example of a post mating isolating mechanism
Went to gene pools are isolated for time and then reunited, how do you tell if they are still the same species?
If they can breed and their offspring can
And an ecological isolation the two groups of organisms can be within sight of each other. True or false?
If a new species is formed within the initial gene pool, it is which category of speciation?
Extinction is usually caused by what?
Destruction of habitat
If population cannot breed and has offspring that cannot breed
What is alopatric speciation
If isolated, different species. If they can breed, same species.
Define sympatric speciation
Mutation takes place, so there are two separate species. A gene pool within the gene pool
What is parapatric speciation
A type of aloepatric speciation
What are the pre-zygotic isolating mechanisms
Habitat, Temporal, behavioral, mechanical, gamete