An understanding of which of these best enabled scientists to determine the approximate ages of fossils?

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Adrought killed all the plants in an agricultural farmland. gradually, due to wind and some birds for. nearby areas, new plants started sprouting l. what stage of succession was taking place in the farmland? a) competition b) nudation c) ecesis d) reaction e) migration