出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/07/20 07:46 UTC 版)
Root nodules occur on the roots of plants (primarily Fabaceae) that associate with symbiotic nitrogen-fixing bacteria. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia. This process has evolved multiple times within the Fabaceae, as well as in other species found within the Rosid clade.
to root out an evil―eradicate an evil―extirpate a pernicious doctrine―exterminate a pernicious sect
the parietal bone
the skull
the occipital bone
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