Evolution-speciation Flashcards
1
Q
A species is a
A
Group of organisms which can interbreed and produce fertile offspring, and which do not normally breed with other groups.
2
Q
What are isolation barriers important for
A
In preventing gene flow between sub populations during speciation
3
Q
Geographical isolation barrier
A
Leads to allopatric speciation.
4
Q
Behavioural or ecological barriers lead to?
A
sympatric speciation
5
Q
Why is sympatric speciation far less common than allopatric speciation
A
It would require a very strong, localised selective pressure to completely interrupt gene flow between the two populations.
6
Q
What is speciation
A
Speciation is the generation of new biological species by evolution as a result of isolation, mutation and selection
