Content Statements:

• Fossils can be compared to one another and to present-day organisms according to their similarities and differences.

• Changes in an organisms environment are sometimes beneficial to its survival and sometimes harmful.

• The economic development of the U.S. continues to influence and be influenced by agriculture, industry, and natural resources in Ohio.

• People have modified the environment since prehistoric times. There are both positive and negative consequences for modifying the environment in Ohio and the U.S.