Evolution

2. A population of interbreeding organisms capable of producing fertile offspring
5. the study of the history of life on earth
7. form of an element with the same no. of protons but different no. of neutrons
10. Structures similar in function, but not in the design
13. remains/tracing of a once-living organism
15. the amount of time it takes for half of a specimen's Carbon to decay
16. What is the evolution
18. many related species evolve from a single ancestral species

1. structures which are not used but still there (tiny)
3. formation of a new species
4. structures similar in design but not in function
6. previously related organisms become less alike
8. of species darwins first book
9. the study of the development of different organisms
11. unrelated organisms develop similar characteristics
12. Age determined through analysis of chemical and physical properties of rocks/fossils
14. Determine the approx. age of a specimen
17. selection darwin came up with evolution because of