Which chelating agent found in soil are produced by bacteria?

(a)

Siderophores

(b)

EDTA

(c)

Auxin

(d)

Leghaemoglobip

Leghaemoglobin is ________

(a)

Oxygen scavenger in BGA

(b)

Oxygen, scavenger in Rhizobium

(c)

Oxygen scavenger in legume

(d)

scavenger in all nitrogen fixers

Plants deficient of element zinc, shows its effect on the biosynthesis of plant growth hormone _________

(a)

Auxin

(b)

Cytokinin

(c)

Ethylene

(d)

Abscisic acid

Minerals that play an important role for activation of enzymes involved in respiration.

(a)

Sulphur and Calcium

(b)

Calcium and Potassium

(c)

Nitrogen and Molybdenum

(d)

Magnesium and Manganese

The macro nutrient which is an essential component of all organic compounds yet not obtained by plants from soil is _________

(a)

Nitrogen

(b)

Carbon

(c)

Phosphorous

(d)

Magnesium

A plant which is being researched as cleaning agent for polluted waters  ________

(a)

Pongamia

(b)

Withania

(c)

Lemon

(d)

Moringa

Write the role of nitrogenase enzyme in nitrogen fixation? 

What are NPK fertilizers?

What are chelating agents?

What are siderophores?

Explain 'Mineral toxicity'.

Name two immobile elements found in plants.

The nitrogen is present in the atmosphere in huge amount but higher plants fail to utilize it. Why?

Explain the insectivorous mode of nutrition in angiosperms?

List the criteria for essential minerals.

What is aeroponics?

Explain the stages involved in nitrogen cycle.

Write a note on Nitrogen metabolism.