Class 12 Biology MCQs Chapter – 2
61. A monothecous anther with two microsporangia is found in :
(A) Brassica
(B) Corianders
(C) Legumes
(D) Hibiscus
Ans – (A)
62. The tissue which attaches the ovules inside the ovary is :
(A) Funicle
(B) Hilum
(C) Placenta
(D) Chalaza
Ans – (C)
63. Point out the odd one :
(A) archesporium
(B) oogonium
(C) ovule
(D) antheridium
Ans – (C)
64. Mieropyle is found in
(A) ovule
(B) seeu
(C) ovule and seed both
(D) fruit
Ans – (C)
65. Female gametophyte is represented by :
(A) ovule
(B) embryo sac
(C) megaspore mother cell
(D) megasporophyll
Ans – (B)
66. The female gamete of angiosperm is represented by :
(A) egg
(B) carpel
(C) pollen grain
(D) oospore
Ans – (A)
67. The female gametophyte (embryo sac) of a typical dicot (= polygonum) at the time of fertilization is :
(A) 8-nucleated and 7-celled
(B) 7-nucleated and 8-celled
(C) 4-nucleated and 4-celled
(D) 8-nucleated and 8-celled
Ans – (A)
68. Filliform apparatus characteristic of :
(A) synergids
(B) 3g
(C)anther wall
(D lantipodal cells
Ans – (A)
69. The haploid cell which divide by mitosis to form embryo sac is :
(A) megaspore mother cell
(B) microspore mother cell
(C) functional megaspore
(D) non-functional megaspore
Ans – (C)
70. Largest cell in the ovule is :
(A) MMC
(B) antipodal
(C) eentral cell
(D) size of cells variable
Ans – (C)
71. When anthers and stigma in an inter sexual flower, mature at different times the condition is called:
(A) dicliny
(B) dichogamy
(C) herkogamy
(D) cleistogamy
Ans – (B)
72. Maturation of gynaecium before anthers of the same flower is :
(A) Protogyny
(B) Protandry
(C) Heterogamy
(D) Autogamy
Ans – (A)
73. A typical example of cross pollination is:
(A) Wheat
(B) Tomato
(C) Potato
(D) Maize
Ans – (D)
74. For self pollination, a flower should be :
(A) asexual
(B) monosexual
(C) unisexual
(D) bisexual
Ans – (D)
75. Anther represents :
(A) sporogonium
(B) male gametophyte
(C) male sporophyll
(D) sporangium
Ans – (C)
76. The developing pollen derives its nutrition from:
(A) tapetum
(B) endothecium
(C) middle layers
(D) SMC
Ans – (A)
77. Pollen grains are non-green due to
(A) absence of plastids
(B) degeneration of plastids
(C) conversion of plastids into chromoplasts
(D) attraction of vectors
Ans – (A)
78. If there are only four sporogenous cells in an anther, the number of pollen grains will be :
(A) 4
(B) 8
(C) 16
(D) 12
Ans – (C)
79. Ploidy in a pollen grain (= cyperus) is :
(A) 5n
(B) 3n
(C) n
(D) 2n
Ans – (C)
80. Pollen grains is related to embryosac as :
(A) sperm to egg
(B) male gametophyte to female gametophyte
(C) male gametophyte to egg
(D) sperm to female gametophyte
Ans – (B)
