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31. Wings of birds and insects are (NTSE Uttar Pradesh, Stage-I, 2016-17)
Vestigial organs
Homologous organs
Analogous organs
None of these
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32. The book "Origin of species" belongs to (NTSE Jharkhand, Stage-I, 2016-17)
Lamarck
Weismann
Darwin
Oparin
33. The wings of butterfly and birds are the example of (NTSE Jharkhand, Stage-I, 2016-17)
Vestigial organ
Analogous organ
Homologous organ
34. Sex-chromosome found in male human is (NTSE Jharkhand, Stage-I, 2016-17)
Only X
Only Y
XX
X and Y both
35. Genotypic ratio of Mendel's monohybrid cross is (NTSE Jharkhand, Stage-I, 2016-17)
1 : 3
3 : 1
9: 3
1 : 2 : 1
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