NTA Abhyas NEET2020BotanyMineral NutritionPractice
Select the incorrect statement from the following.
Options
- ARhizobium multiply and colonises the surroundings of roots and gets attached to epidermal and root hair cell.
- BSuccessful infection of the root hair causes it to curl.
- CThe nodule establishes a direct vascular connection with the host.
- DInfection thread carries the bacteria to xylem and phloem.
Correct answer
D. Infection thread carries the bacteria to xylem and phloem.
Step-by-step solution
During root nodule formation infection thread carries the bacteria into the cortex of the root, where they initiates the nodule formation in the cortex of the root. Then the bacteria are released from the thread into the cortical cells which leads to differentiation of specialized nitrogen fixing cells. The nodule establishes a direct vascular connection with the host for exchange of nutrients.