Nitrogen Fixation: Quiz
Move the mouse over all of this photo for a more detailed description of a root nodule then answer the following question:
What do the bacteroids get from the host plant?
Proteins, sugar and water
Sugar, water and some mineral ions
Nothing because bacteroids are self-sufficient
try again
No, the phloem supplies sugar and water but does not transport proteins.
Yes, the contents of the phloem are available to the bacteroids.
Well done, you answered correctly. Use the 'next' button to proceed.
No, the bacteroids depend on the host for a source of energy and water - see (b).
Transverse section of a root nodule.
Move the mouse over the text below for different tissues in the section...
Uninfected cortical cells
Vascular bundle
Cells containing bacteroids