Microscopes were used to study cells beginning in the a. 16th century.
c. 18th century
b. 17th century
d. 19th century

What are some characteristics of a free enterprise economy?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

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