The smallest unit of life that can survive and reproduce on its own is a(n):
a. atom
b. cell
c. molecule
d. organ
e. population
Question 2
The lunar maria are
a. the lava plains of the lunar lowlands.
b. the smooth plateaus of the lunar highlands.
c. less than one billion years old.
d. moving plates of lunar crust.
e. older than the lunar highlands.