patterns of evolution Flashcards
1
Q
punctuated equalibrium
A
the hypothesis that evolutionary development is marked by isolated episodes of rapid speciation between long periods of little or no change.
2
Q
phyletic gradualism
A
evolution generally occurs by smooth, continuous, gradual transformations of whole lineages
3
Q
convergent evolution
A
the independent evolution of features that are similar in species spanning over different eras
4
Q
Co-evolution
A
Species don’t evolve in isolation from each other
5
Q
MACROevolution
A
Speciation events or splits from a ‘lineage’
6
Q
MICROevolution
A
changes within a species or within a ‘lineage’
7
Q
explanation for sudden species appearances in fossil records
A
- major gaps in the fossil records
- evolutionary changes happen suddleny in short bursts
8
Q
punctuated equilibrium in bryzoans
A
46 characters
1000 fossil specimens
100 carribean populations
recontructed the phylogeny
