Biolo

2. type of selection that favors one extreme trait
6. production of more offspring than can survive in the environment
7. structures, body parts that have lost most or all of their original function
9. random change in DNA that can create new traits
12. success, situation where some organisms survive and reproduce more than others
15. type of selection that favors average traits and reduces extremes
17. ability of an organism to survive and reproduce in its environment
19. of superposition, rule stating that lower rock layers are older than higher layers
21. change in populations of living organisms over many generations
22. structures, body parts with similar function but different evolutionary origins
23. type of selection that favors both extreme traits over the average

1. differences in traits among individuals of the same species
3. process where organisms with helpful traits are more likely to survive and reproduce
4. body parts with similar structure due to shared ancestry
5. traits that help an organism survive and reproduce in its environment
8. study of early development of organisms
10. Type of selection that is human controlled breeding to produce desired traits
11. with modification, idea that species change over time while sharing common ancestors
13. Line, boundary separating species with different evolutionary histories
14. passing of traits from parents to offspring
16. study of how species are distributed across Earth
18. process where traits increase chances of attracting a mate
20. preserved remains or traces of ancient organisms