Which role do plants play in the nitrogen cycle? O A. They take the nitrogen found in soil and turn it back into nitrogen
gas.
B. They break down wastes and return nitrogen compounds to soil.
C. They take up the usable forms of nitrogen found in soil.
D. They take up nitrogen gas directly from the atmosphere.

C .they take up the usable forms of nitrogen found in the soil .

no statements shown

the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl