Microbes as Biofertilizers

A heterocyst is a differentiated cyanobacterial cell that carries out nitrogen fixation. 

Explain the process of nitrogen fixation by cyanobacteria.

Name the glycoprotein secreted by the root cells of the leguminous plant for attraction of nitrogen-fixing bacteria.

Fill in the blank with the correct option from the bracket.

A prokaryotic autotrophic nitrogen-fixing symbiont is found in _____. (Cicer, Cycas, Pisum, Alnus)

The function of leghaemoglobin in the root nodules of legumes is the Inhibition of nitrogenase activity.

Rhizobium can fix nitrogen only in the presence of the pigment leghaemoglobin.

Fill in the blank with the correct option from the bracket.

Organisms that fix nitrogen in aquatic habitats are _____.(green algae, cyanobacteria, Protozoa, diatoms)

Which hormone/s is/are responsible for nodule formation?

The essential elements for the activation of nitrogen fixation in microorganisms are

Name the nitrogen-fixing organism present in the root nodules of Alnus.

Nodule formation is an example of bacterial hypertrophy.

Rhizobium and Frankia are able to fix nitrogen in the soil when present freely in the soil.

_____ have red pigment in their roots. (Radish, Mustard, Soyabean, Maize)

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing organism?

Identify the biofertilizers

Mycorrhiza is a symbiotic association between fungi and plants.

The substances containing living microorganisms which help to increase the soil nutrients are called

A bacterium found in root nodules of legume plants is _____ (rhizobium/azotobacter)

To convert atmospheric nitrogen into organic compounds by micro-organisms is called _____nitrogen fixation.

Nitrogen fixation is shown by prokaryotes and not by eukaryotes.