The product(s) of the reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are.
1. Nitrate alone
2. Ammonia and oxygen
3. Ammonia and hydrogen
4. Ammonia alone

Match Column-I with Column- II.

Choose the correct answer from the options given below.

Roots of which plant contains a pink pigment that has an affinity for oxygen:
1.  Carrot
2.  Soyabean
3.  Mustard
4.  Radish

Both Rhizobium and Frankia:
1. are symbionts with legumes
2. are symbionts with actinorrhizal plants
3. initiate the formation of root nodules in the symbiont plant
4. are filamentous bacteria

A plant infected with Rhizobium:
1. has necrotic tissues.
2. dies.
3. gets flaccid.
4. probably will grow faster.