Evolution

7. A change in a gene or chromosome. This change can be helpful, harmful, or do nothing.
11. A segment of DNA on a chromosome that codes for a specific trait
12. remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
13. A complex molecule containing the genetic information that makes up the chromosomes.
14. Ability of an organism to survive and reproduce in its environment
16. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.

1. Structures in different species that are similar because of common ancestry.
2. Differences among individuals in the composition of their genes or other DNA segments
3. Selection by humans for breeding of useful traits from the natural variation among different organisms
4. A group of similar organisms that can breed and produce fertile offspring.
5. A group of individuals that belong to the same species and live in the same area
6. Process by which unrelated organisms independently evolve similarities when adapting to similar environments
8. similarities among unrelated species that result from convergent evolution
9. A characteristic that an organism can pass on to its offspring through its genes.
10. Preserved remains of once-living organisms
15. The gradual change in a species over time