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46. The undifferentiated mass of cells in tissue culture is called (NTSE Rajasthan, Stage-I, 2016-17)
Tissue
Embryo
Callus
Spore
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47. Sexually transmitted disease is (NTSE Bihar, Stage-I, 2016-17)
Measles
TB
Gonorrhoea
Typhoid
48. Semen is frozen (NTSE Bihar, Stage-I, 2016-17)
Liquid nitrogen
Refrigerator
Ice
All of these
49. Read the following statements and select the correct option. (a) Wind pollinating flowers need to produce more quantity of pollen grains. (b) Seeds from cross pollinated flowers produce weaker and less healthy plants. (NTSE Karnataka, Stage-I, 2016-17)
(a) is false & (b) is true
(a) is true & (b) is false
Both (a) & (b) are true
Neither (a) nor (b) are true
50. Male reproductive part of the flower is (NTSE Jharkhand, Stage-I, 2016-17)
Gynoecium
Corolla
Calyx
Androecium
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