Speciation and Phylogeny Flashcards
1
Q
Evolution Processes
A
Natural
Genetic
Mutation
2
Q
Barriers lead to
A
Speciation
3
Q
Natural Selection
A
Shows phynotype’s more favored offspring
4
Q
More Favored Offspring have
A
- More favorable characteristics
- Must vary in characteristics
5
Q
4 types of natural selection
A
- Directional
- Stabilizing
- Disruptive
- Balanced
6
Q
2 types of evolution
A
- Convergent
- Divergent
7
Q
Convergent
A
evolve from different origins, similar traits but no common ancestry (sharks vs. dolphons)
8
Q
Divergent
A
evolve in diverse directions from common point, most things
9
Q
Directional
A
one more favored to survive than others
10
Q
Stabilizing
A
middle/average range more favored to survive
11
Q
Balanced
A
no change, all able to survive
12
Q
Disruptive
A
both opposite phynotypes favored to survive
13
Q
Gene flow
A
transfer of gene variation
14
Q
Increased gene flow
A
new population
15
Q
Speciation
A
- from single ancestry
- splitting event
- must form 2 distinct species
- adds branches to tree
