How are fish often preserved? a. mineralization c. replacement b. recrystallization d. carbonization

What field of science did harry hess study?

Classify the structures as homologous or analogous, depending on their structure and function.

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of