Multiple Choice QuestionsThe gametophyte is not an independent, free-living generation in
Adiantum
Marchantia
Pinus
Pinus
In 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
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
B.
small, producing large number of dry pollen grains
Pollination taking place by means of wind is known as anemophily, eg, Zea mays, Cannabis Pinus, etc. Some features of wind-pollinated flowers are -
i) Non -essential Whorls such as calyx, corolla and bracts, bracteoles are not showy.
ii) The perianth lobes are undeveloped or reduced and sometimes absent.
iii) Flowers are devoid of scent and nectars.
iv) Plants produce a very large quantity of dusty pollen grains.
v) Pollen grains are dry, very small sized, non-sticky and unwettable
These features are helpful for the individuality of pollen grains.
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
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