Michael

6. type of natural selection where genetic diversity decreases as the population stabilizes
8. characteristics that are similar because they originated from a common ancestor
10. traits disappear or appear by CHANCE, affectssmall populations the most
13. previous generations
14. a branching diagram showing how species relate to a common ancestor
17. how many offspring each group is able to leave behind
18. how often an allele (trait) shows up in a population
19. organs (bone, lungs, stems, cilia) that are similar between different species that show a common ancestor
20. change over time within a species

1. the different ways that evolution works such as mutation, natural selection, gene flow, genetic drift, and recombination
2. traits from one organism are MOVED into a new group (black bull gets into a herd of brown cows)
3. a trait that lets that organism be more successful and reproduce
4. a type of natural selection in which a single phenotype is favored, casing a shift in that direction
5. study of past and present geographical distribution of species
7. an ancestor that two or more descendants have in common
9. selection- selective breeding, opposite of natural selection
11. accumulation of differences in a species that leads to speciation
12. chooses what traits will continue to the next generation (NOT selective breeding)
15. Scientist in the 1800’s who developed the theory of evolution by natural selectionAnalogous structures- same purpose but different structure (wings of bird, bat, fly)
16. descendent)- a child of the parents or grandparents