What is the function of bacteria the live in the roots of legumes?

Question

A.) to provide usable nitrogen for the plants.
B.) to change ammonia into nitrogen plants.
C.)to provide ATP for the plants.
D.) to prevent reproduction.

Answer 1

A.) to provide usable nitrogen for the plants.

Answer 2

When a field has been heavily used (ie by growing corn or some other nitrogen-stripping crop) for several years, the traditional next step is to let it "lie fallow" for a year or so - which may entail planting it in beans or alfalfa or some other crop which replenishes the soil nitrogen levels. These plants have nodules in the roots which serve as living quarters for very interesting bacteria known as 'nitrogen-fixing' bacteria because they can take elemental nitrogen (N2) and rebuild it into nitrogen compounds that plants can pick up and use to build seeds with.

Answer 3

Actually, the nitrogen-fixing bacteria on the roots of legumes help replenish the nitrogen in the soil.

Answer 4

A.)To provide useful Nitrogen for the plants.