2018
AIIMS
MCQ
AIIMS 2018
Azolla is used as a biofertiliser because it
A.
has association of mycorrhiza
B.
multiplies at faster rate to produce massive biomass
C.
has association of nitrogen-fixing Rhizobium
D.
has association of nitrogen-fixing cyanobacteria
2018
AIIMS
MCQ
AIIMS 2018
Assertion Nitrogen-fixing bacteria of legume root nodules survive in oxygen depleted cells.
Reason Leghaemoglobin completely removes oxygen from nodule cells.
A.
Both A and R are true and R is the correct explanation of A
B.
Both A and R are true, but R is not the correct explanation of A
C.
A is true, but R is false
D.
A and R are false
2018
AIIMS
MCQ
AIIMS 2018
Assertion Magnesium is important in photosynthesis and carbohydrate metabolism.
Reason $\mathrm{Mg}^{2+}$ is involved in the synthesis of nucleic acids.
A.
Both A and R are true and R is the correct explanation of A
B.
Both A and R are true, but R is not the correct explanation of A
C.
A is true, but R is false
D.
A and R are false