Write a note on Biological nitrogen fixation by Rhizobia.

With regard to the Biological Nitrogen Fixation by Rhizobium in association with soybean,which one of the following statement/ statements does not hold true

Write a note on Portal vein.

What is nitrogen fixation?

Write a note on Bryophyta.

Write a note on Diarrhoea.

Write a note on: Bakelite.

Write a short note on nitrogen fixation?

Write a note on Jaundice.

Write a note on thalamus.

Name the two types of biological nitrogen fixation.