7.10: Speciation (allopatric, Sympatric) Flashcards
1
Q
What is a species?
A
A group able to Interbreed and produce viable, fertile offspring
2
Q
What is speciation? What does it result in?
A
formation of new species
- results in diversity of life forms
3
Q
____ has an impact on speciation.
A
Geography
4
Q
What are two modes of speciation?
A
- Allopatric speciation
2. Sympatric speciation
5
Q
What occurs allopatric speciation?
A
- Physical barrier divides population, or a small population is separated from main population
6
Q
What are the effects of allopatric speciation? What is it caused by usually? (4)
A
- populations are geographically isolated
- this would prevent gene flow
- often caused by natural disasters
Ex. Darwin’s finches
7
Q
What occurs in sympatric speciation?
A
- a new species evolves while still inhabiting the same geographic region as the ancestral species
8
Q
How does sympatric speciation usually occur?
A
Usually due to the exploitation of a new niche
