(a)[4]
State the ecological terms that correspond to each of the following descriptions of these species.
(b)[3]
Explain the importance of nitrogen-fixing organisms, such as A. azollae, in ecosystems.
Biology 9700 · AS & A Level · Testing for biological molecules
Testing for biological molecules — practice question
Azolla filiculoides is a floating aquatic fern that rests on the surface of lakes. The nitrogen-fixing microorganism Anabaena azollae lives inside the fern leaves. The beetle Stenopelmus rufinasus feeds on A. filiculoides.
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