Free living rhizome invade the legume through an……………
a) nodule
b) infection thread
c) roots
d) none of these
Infection thread is formed in the………………
a) root cap
b) root hair
c) rhizoids
d) rhizome
Each root nodule is packed with thousand of living……………………… bacteria
a) shagella
b) saurious
c) rhizobium bacteria
d) none of these
The infection thread is constructed by root cells and not bacteria and is formed only in response of……………..
a) virus disease
b) infection
c) bacterial disease
d) all of these
Root nodulated non legume is a diverse group of woody species such as elder with e.g Frankia. These fuilamentous bacteria infects the roots of plants forming
a) root hair of plants
b) infection thread
c) actinorhizal root nodules
d) none of these
Nitrogen fixing bacteria contain enzyme called
a) trypsin
b) nitrogenase
c) aminase
d) none of these
