1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Which aquatic fern performs nitrogen fixation?
A
Azolla
B
Nostoc
C
Salvia
D
Salvinia
2
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Mg is a component of
A
chlorophyll
B
cytochrome
C
haemoglobin
D
haemocyanin
3
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are
A
yellowish leaves
B
colourless petiole
C
dark green leaves
D
shoot apex die.
4
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Plants take zinc in the form of
A
ZnSO4
B
Zn++
C
ZnO
D
Zn.
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