Speciation

2. fossil evidence of gradualism
5. study of evolutionary relationships including a measure of time
9. the idea that species stay the same for long periods and then have short bursts of evolution
11. a geological feature which isolates populations from interbreeding
13. formation of a new, distinct species through evolution
15. when many new species evolve in a relatively short period, evidence for punctuated equilibrium
16. when two species from different evolutionary branches evolve similar characteristics due to similar ecological roles

1. small changes within a species, many of which lead to speciation =
3. study of a evolutionary relationships based on evidence
4. when many species disappear in a relatively short period, evidence for punctuated equilibrium
6. an ancestral groups diversifies into different species
7. structures which are different but perform the same function, often found on convergent species
8. the inability of a species to breed successfully with related species due to various barriers
10. the idea that divergent evolution is slow microevolutionary changes over time
12. speciation due to reproductive isolating mechanisms (best known form of speciation)
14. when divergent evolution leads to a large number of distantly related species occupying different ecological niches