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61. According to the evolutionary theory, formation of a new species is generally due to (NTSE Haryana, Stage-I, 2016-17)
Sudden creation by nature
Accumulation of variations over several generations
Clones formed during asexual reproduction
Movement of individuals are habitat to other
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62. Rajasaurus is a fossil of (NTSE NRajasthan, Stage-I, 2016-17)
Tree trunk
Invertebrate
Fish
Dinosaur
63. Mendel is popular for postulating (NTSE Chandigarh, Stage-I, 2015-16)
Origin of species
Cell theory
Linkage theory
Laws of inheritance
64. A rose plant obtained from self cross of heterozygous red has produced 200 flowers. How many of them would be heterozygous red flowers? (NTSE Andhra Pradesh, Stage-I, 2016-17)
25
50
100
150
65. Which one of the following statements is true? (NTSE Punjab, Stage-I, 2016-17)
In humans there are two pairs of sex chromosome
A child who inherits an X chromosome from father will be a boy
A child who inherits a Y chromosome from father will be a girl
A child who inherits an X chromosome from father will be a girl
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