chapter 11

2. body parts of organisms that are similar in structure and position but different in function
3. a person that studies plants and animals by observing them
5. made up of all the fossils ever discovered on Earth
6. the impression of an organism in a rock
10. is a copy of an organisms in a rock
11. the study of similarities and differences among structure of living species
12. the preserved evidence of the activity of an organism
16. change over time in population of related organisms
17. animals evolving and adapting to its environment
18. the resemblance of one species to another

1. is a chart that divides Earth's history into different time units
4. body parts that have lost their original function through evolution
7. slight difference in an inherited trait of individual members of a species
8. adaptation that enables a species to blend in with its environment
9. occurs when the last individual of a species dies
13. body parts that perform a similar function but differ in structure
14. the breeding of organisms for desired characteristics
15. the process through which populations of living organisms adapt and change