Multiple Choice QuestionsIn which one of the following pollination is autogamous?
Xenogamy
Chasmogamy
Cleistogamy
Cleistogamy
In angiosperms, functional megaspore develops into
embryo sac
ovule
endosperm
endosperm
Apomictic embryos in Citrus arise from
Synergids
maternal sporophytic tissue in ovule
antipodal
antipodal
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
xenogamy
geitonogamy
karyogamy
karyogamy
B.
geitonogamy
Geitonogamy (Greek geiton = neighbour and gameiu = to marry) involves the transfer of pollen grains from a male flower to the stigma of another female flower origination on the same plant. Thus, geitonogamy operates only in monoecious plants i.e plants having male and female flowers on different places but on the same plant, e.g maize (zea mays). In animal pollinated system, thisis accomplished by pollinator visiting multiple flowers on the same plant. It is also possible within species that are wind pollinated.
Wind pollinated flowers are
small, brightly coloured, producing large number of pollen grains
small, producing large number of dry pollen grains
large, producing abundant nectar and pollen
large, producing abundant nectar and pollen
Synapsis occurs between
a male and female gamete
mRNA and ribosomes
spindle fibres and centromere
spindle fibres and centromere
Cotyledons and testa are edible parts of
groundnut and pomegranate
walnut and tamarind
french bean and coconut
french bean and coconut
An example of a seed with endosperm, perisperm and caruncle is
Cotton
coffee
lily
lily
Which one of the flowing pairs of plants structures has haploid number of chromosomes?
Megaspore mother cell and antipodal cells
Egg cell and antipodal cells
Nucellus and antipodal cells
Nucellus and antipodal cells
Unisexuality of flowers prevents
autogamy, but not geitonogamy
Both geitonogamy and xenogamy
geitonogamy, but not xenogamy
geitonogamy, but not xenogamy
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