61. Archaeopteryx' is a connecting link between which of the following classes of animal?
62. The initial concept of a mechanism for regulation of gene expression, was generated by
63. Who synthesised the DNA in vitro?
64. Limbs of frog, lizard, bird and human are examples of . . . . . . . . organs.
65. Whenever two members of an allelic series are crossed, it is found that their F2 generation always contains homozygous dominant, heterozygous and homozygous recessive in the ratio of
66. Mutagens are
67. Chain termination during protein synthesis is brought about by which of the following?
68. The starting amino acids in eukaryotes and prokaryotes are, respectively,
69. The sugar present in DNA is
70. Mendel's principles of inheritance are based on
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