Dynamic Earth

2. The period where we first see a rapid increase in biodiversity
3. Aid in survival to an environment
6. Developed the Theory of Evolution, wrote the book "The Origin of Species"
7. Structures that the same across different species but may have a different function
9. The random change in gene frequencies (two words)
10. Developed the idea that the layers of the earth are older as you go deeper into the earth
11. Rapid loss of biodiversity
13. Descent with modification
14. Developed the idea that population size are limited by resources and competition
18. Preserved structures in stone
19. The first organisms
20. A type of selection that occurs based on human involvement
21. Structures that remain as part of an organism that no longer serve a major function
23. Longest period of geologic time

1. Type of selection that works on one extreme or another
4. Type of selection that works on the moderate adaptation, favoring the extremes
5. Came up with the idea of evolution independently of Darwin
7. Developed the idea of gradual geologic change
8. A change in genetic code for proteins
12. A type of selection that occurs on its own
15. Type of selection that works on both extremes, favoring the moderate adaptation
16. The mixing of genes through meiosis
17. The movement of genes in or out of a population (two words)
22. Developed the idea that animals can change over time