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Worksheetssexual reproduction in flowering plants part 1
Total questions: 20
Worksheet time: 20mins
Cleistogamous flowers are:
insect pollinated
bird pollinated
wind pollinated
self pollinated
The term used for transfer of pollen grains from anthers of one plant to stigma of different plants which, during pollination, brings genetically different types of pollen grains to stigma is ;
Cleistogamy
chasmogamy
Xenogamy
geitonogamy
The ovule of an angiopserm is technically equivalent to :
megaspore mother cell
megaspore
megasporangium
megasporophyll
A callose covering is present over
egg
male gametes
microspore mother cell
pollen grains
what is the function of filiform apparatus at the entrance into ovule?
brings about opening of the pollen tube
guides pollen tube from synergids to egg
helps in the entry of the pollen tube into a synergids
prevents entry of more than one pollen tube into a synergids
Unisexuality of flowers prevents
autogamy and geitonogamy
both geitonogamy and xenogamy
autogamy but not geitonogamy
geitonogamy but not xenogamy
Transfer of pollen grains from anther to stigma of anther flower of the same plants is called
chasmogamy
geitonogamy
autogamy
xenogamy
Which is the most common type of embryo sac in angiosperm?
tetrasporic with one mitotic stage
monosporic with three sequential mitotic division
Monosporic with two sequential mitotic divisions
Bisporic with two sequential mitotic divisions
What is the function of germ pore?
Emergence of radicle
Absorption of water for seed germination
Initiation of pollen tube
All the above
The body of ovule is fused within the funicle at :
Micropyle
Hilum
Nucellus
chalaza
Function of synergids is to :
fuse with extra male gametes and form endosperm
Protect egg from pathogens
Produce additional embryo
attract pollen tube and bear its shock
Which function of tapetum is correct?
Transportation of nutrients to inner side of anther
helps in pollen wall formation
synthesis of callase enzymes for separation of microspore tetrads
all of the above
Anther is generally
monosporangiate
tetrasporangiate
trisporangiate
bisporangiate
How many pollen mother cells should undergo meiotic divison to produce 64 pollen grains ?
64
16
32
8
Both, autogamy and geitonogamy are prevented in
maize
cucumber
castor
papaya
cells that found in a pollen grain when it is shed at 3-celled stage are
1 generative cell, 2 male gametes
1 vegetative cell, 2 male gametes
1 vegetative cell, 1 generative cell, 1 male gamete
either 1 or 3
----------of the pollen grains divide to form two male gametes
microspore mother cell
vegetative cell
generative cell
None of these
callase enzymes is produce by :
tapetum
pollen
endothecium
middle layer
Autogamy can occur in a chasmogamous flower if :
pollen matures before maturity of ovule
ovules mature before maturity of pollen
both pollen and ovules mature simultaneously
both anther and sigma are of equal lengths
Ploidy of endothecium, microspore mother cell, tapetum and microspore is respectively:
n,2n,2n,n
2n,2n,2n, n
n,n,n,2n
2n,n,2n,n
