Evolutionary History

2. a trait that makes it more likely that an individual will survive in a specific environment
5. a process by which species adapt to the environmental changes over a very long time
8. classify based on scientific examination
15. the very long time that spans the history of the earth, from the very first cellular life to the present
16. sharing a common ancestor population
18. an older population from which two or more newer species descended
21. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
23. a specific characteristic of an individual organism
25. to receive genes from a parent
26. a scientist who studies fossils in order to understand the ancient history of life on Earth

1. a group of the same type of organism living in the same area
3. living things, such as plants, animals, and bacteria
4. a body structure in two or more species that features the same parts ( for example, the same bones)
6. the process by which the distribution of traits in a population changes over many generations.
7. a part of an organism ( for example, one or more bones)
9. a random change to a gene that sometimes results in a new trait
10. a graph that uses bars to show how characteristics or values are distributed within a group
11. a more recent species that evolved from an ancestor population
12. the process by which one population evolves into two or more different species
13. everything ( living and nonliving) that surrounds an organism
14. a group of organisms of the same king( in one or more populations) that do not reproduce with organisms from any other group
17. having died out completely and no longer alive anywhere on Earth
19. a related organism from a previous generation
20. a group of individuals born and living at about the same time
22. when something stays mostly the same overtime
24. an organism's arm, leg, or wing