Mineral Nutriti...

Which of the following elements is present in abundance in the air as a non-mineral element but plants usually obtain it from soil as nitrate or ammonium ion?

Which of the following elements is required in meristematic and differentiating tissues and is in excess in older leaves?

Chlorophyll formation, growth metabolism and nodule formation in legumes are the functions of

Intervenial chlorosis appearing first in young leaves, veins initially green, necrosis later on and reduced growth are the deficiency symptoms of

Which of the following are involved in the translocation of organic substances in the phloem?

a. Boron
b. Magnesium
c. Potassium
d. Phosphorus

Consider the following statements and mark your answer accordingly:

a. Magnesium is a component of chlorophyll that takes part in the conversion of light energy into chemical energy.
b. Salt uptake increases with the increase in the rate of transpiration and transport of water.

Consider the following statements and mark your answer accordingly:

a. After absorption from the soil by epiblema cells, the mineral salts pass radially inwards into the lenticels.
b. Nitrogen cycle is regular circulation of nitrogen among living organisms, reservoir pool in the atmosphere and cycling pool in the lithosphere.

Biological nitrogen fixation is the second most important natural process performed by prokaryotes. Which of the following prokaryotes are saprotrophic free living nitrogen fixing bacteria?

Which of the following phenomena is the conversion of ammonium nitrogen to nitrate nitrogen and can be carried out by Aspergillus flavus?