Select the mismatch.
(a) Frankia Alnus
(b) Rhodospirillium Mycorrhiza
(c) Anabaena Nitrogen fixer
(d) Rhizobium Alfa-fa
Which is essential for the growth of root tip?
In which of the following, all three are macronutrients?
(a) Iron, copper, molybdenum
(b) Molybdenum, magnesium, manganese
(c) Nitrogen, magnesium, phosphorus
(d) Boron, zinc, manganese
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
Minerals known to be required in large amounts for plant growth include
(a) Phosphorus, potassium, sulphur, calcium
(b) calcium, magnesium, manganese, copper
(c) potassium, phosphorus, selenium, boron
(d) magnessium, sulphur, iron, zinc
Deficiency symptoms of nitrogen and potassium are visible first in
(a) senescent leaves
(b) young leaves
The most abundant intracellular cation is
The first stable product of fixation of atmospheric nitrogen in leguminous plants is
Best defined function of manganese in green plants is
(a) photolysis of water
(b) Calvin cycle
(c) nitrogen fixation
(d) water absorption
Which one of the following is wrong statement?
(a) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also
(b) Root nodule forming nirogen fixers live as aerobes under free-living conditions
(c) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
(d) Nitrosomonas and Nitrobacter are chemoautotrophs