Frankia Are

Question

Frankia are
A) a type of arbuscular mycorrhizae.
B) glomerulomycetes that live in root nodules.
C) a species of tree that has root nodules.
D) actinomycetes that fix nitrogen.

Accepted Answer

Frankia are actinomycetes that have the ability to fix atmospheric nitrogen, similar to how rhizobia in legumes fix nitrogen. They form nitrogen-fixing nodules on the roots of certain non-legume plants, such as alder, which is known as actinorhizal symbiosis. Therefore, option A is incorrect as Frankia are not arbuscular mycorrhizae. Option B is also incorrect as glomerulomycetes and Frankia are different groups of microorganisms. Option C is incorrect as Frankia is not a species of tree, but rather a type of bacteria.