<span>Radon may cause lung cancer when inhaled.
a: is formed by the breakdown of the ozone layer
b: may cause lung cancer when inhaled
c: binds with hemoglobin, preventing binding with oxygen
d: contributes to the breakdown of the ozone layer
e: in the atmosphere limits the availability of sunlight for plants</span>
1.responsiveness to the environment
2.growth and change
3.ability to reproduce
4. Having a metabolism and breathing
5. Maintain homeostasis
6.being made of cells
7.passing traits onto offspring
Goods are usually carried on large barges that go through the Volga river, Russia's most valueable geographical asset due to its large extent from East to West.
