61. Match the following columns:
Column I
Column II
a. B-chromosomes
1. Reduction
b. Mitosis is also known as
2. Leucoplasts
c. Meiosis is also known as
3. Equitional division
d. The colourless plastids are known as
4. Extrachromosome
| Column I | Column II |
| a. B-chromosomes | 1. Reduction |
| b. Mitosis is also known as | 2. Leucoplasts |
| c. Meiosis is also known as | 3. Equitional division |
| d. The colourless plastids are known as | 4. Extrachromosome |
62. Concept of single seed descent method was developed by
63. When embryo originates from unfertilized egg, is known as
64. In mutation breeding programme the mutant population can be selected in which generation?
65. Pure line is
66. Over time there is loss in vigour and productivity of clones. The phenomenon is known as
67. For vigour test Paper piercing method was proposed by
68. Self-incompatibility was first reported by
69. When the pollen from one plant falls on the stigma of other flower of the same plant is
70. In tobacco, Nicotiana dighila has originated from a cross between
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