Class 12 Biology MCQs Chapter – 1
61. Process of fusion of haploid cells is
( A ) Cell cycle
( B ) Meiosis
( C ) Mitosis
( D ) Syngamy
Answer-( D )
62 . is vegetatively propagated by leaf segments ?
( A ) Agave and Kalanchoe
( B ) Bryophyllum and Kalanchoe
( C ) Asparagus and Bryophyllum
( D ) Chrysanthemum and Agave
Answer-( B )
63. The maximum number of chromo some in a flowering plant ( = Poa litorosa ) is 2n = 265 , then the minimum number is :
( A ) 2n = 4
( B ) 2n = 14
( C ) 2n = 2
( D ) 2n = 16
Answer-( A )
64. Maize has 10 pair chromosomes . How many linkage groups would it have ?
( A ) 20
( B ) 40
( C ) 10
( D ) 5
Answer-( C )
65. In which of the following species of plants seeds are produced through apomixis :
( A ) Asteraceae and Grass
( B ) Mustard
( C ) Citrus and Mango
( D ) None of these
Answer-( A )
66. Which of the following animals , is / are ovo – viviparous :
( A ) Hen
( B ) Platypus
( C ) Rattle snake
( D ) Echidna
Answer-( C )
67. Parthenogenesis occurs in :
( A ) Axolotle Larva
( B ) Miracidium
( C ) Cercaria
( D ) Sporocyst and redia larva
Answer-( D )
68. When male differs from female in morphology , it is called :
( A ) heterogamy
( B ) homogamy
( C ) sexual dimorphism
( D ) hermaphorditism
Answer-( C )
