1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The wavelength of light absorbed by Pr form of phytochrome is
A
680 nm
B
720 nm
C
620 nm
D
640 nm.
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Treatment of seeds at low temperature under moist conditions to break its dormancy is called
A
stratification
B
scarification
C
vernalization
D
chelation.
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
How does pruning help in making the hedge dense?
A
It releases wound hormones.
B
It induces the differentiation of new shoots from the rootstock.
C
It frees axillary buds from apical dominance.
D
The apical shoot grows faster after pruning.
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
A
Application of iron and magnesium to promote synthesis of chlorophyll
B
Frequent irrigation of the crop
C
Treatment of the plants with cytokinins along with a small does of nitrogenous fertilizer
D
Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophhenoxy acetic acid
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