Earth’s atmosphere is approximately 70% nitrogen (N2). Unfortunately, consumers and producers cannot generally make use of this gas directly. Some organisms have adapted to transforming nitrogen into more usable forms that producers and consumers can use directly. 1) according to the diagram, which terrestrial organisms are able to obtain atmospheric nitrogen?

2) this atmospheric nitrogen must be converted to what molecule?

3) what other organism(s) add this molecule to the soil?

4) what transformation must occur before plants can use the nitrogen?

5) what organism carries out the transformations addressed above?

6) how does nitrogen enter into plants?

7) how does nitrogen enter into animals?

8) how does nitrogen get back into the atmosphere?

9) how must carnivores obtain their nitrogen?

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