fossils

2. - buried organism disappears and leaves an empty space
4. - footprints, trails, etc
6. - mold filled by minerals
8. - minerals replace hard parts (bones, teeth, etc) of organism
10. -the branch of biology that deals with the geographical distribution of plants and animals.
11. -Structures that have no apparent function and appear to be residual parts from a past ancestor
13. - entire organism frozen in ice
14. - Structures that are similar in different species of common ancestry

1. - change in the heritable characteristics of biological populations over successive generations.
3. - the branch of biology and medicine concerned with the study of embryos and their development.
5. - features of different species that are similar in function but not necessarily in structure
7. - any member of a group of extinct fossil
9. - entire organism fossilized in tree sap
12. - thin,soft object (leaf, feather) is buried and sediments later harden
13. - A fossil is any preserved remains, impression, or trace of any once-living thing from a past geographic age