121.
Apomixis was discovered by
A
Leeuwenhoek
B
Winkler
C
Juel & murbeck
D
Navaschin & guignar
Answer :
Winkler
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122.
Endothelium is derived from
A
Integument
B
Placenta
C
Nucellus
D
Funiculus
Answer :
Integument
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123.
Deplopement of embryo from
A
Two polar nuclei of embryosac
B
Secondary nucleus and male gametes
C
Egg cell and male gamete
D
Synergids
Answer :
Egg cell and male gamete
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124.
Which of the following types of embryosac is mostly found in Angiosperm
A
Bisporic polygonum type
B
Tetra sporic type
C
Monosporic - onagred type
D
Monosporic - polygonum type
Answer :
Monosporic - polygonum type
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125.
Which one of the following statements is correct?
A
Geitonogamy involves the pollen and stigma of flowers of different plants
B
Cleistogamous flowers are always autogamous
C
Xenogamy occurs only by wind pollination
D
Chasmogamous flowers do not open at all
Answer :
Cleistogamous flowers are always autogamous
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126.
Total number of meiotic division required for forming 100 zygotes/100 grains of wheat is
A
100
B
75
C
125
D
50
Answer :
125
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127.
Double fertilization is
A
Fusion of two male gametes of a pollen tube with two different eggs
B
Fusion of one male gamete with two polar nuclei
C
Syngamy and triple fusion
D
Fusion of two male gametes with one egg
Answer :
Syngamy and triple fusion
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128.
Development of embryo from egg without fertilization is called
A
Parthenogenesis
B
Parthenocarpy
C
Apospory
D
Apomixis
Answer :
Parthenogenesis
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129.
Nucellar polyembryony is reported in species of
A
Citrus
B
Gossypium
C
Triticum
D
Brassica
Answer :
Citrus
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130.
Persistent nucellus in the seed is known as:
A
Chalaza
B
Perisperm
C
Hilum
D
Tegmen
Answer :
Perisperm
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