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Sexual Reproduction in Flowering Plants
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Embryo sac is monosporic when it develops from
The megaspore mother cell where meiosis has occurred but cytokinesis does not take place
One of the four megaspores of a megaspore mother cell
Three megaspores of a megaspore tetrad
Two functional megaspores
Formation of embryo from vegetative cells derived from zygote is called
Diploid polyembryony
Adventive polyembryony
Apomixis
Apospory
The ovule of an angiosperm is technically equivalent to :
Megaspore mother cell
Megaspore
Megasporangium
Megasporophyll
Double fertilization results in formation of
Megaspore
Endosperm
Fruit
Seed
Cleistogamous flower is found in
Viola
Tobacco
None of the above
Mirabilis
The point of attachment of funicle with body of ovule is
Micropyle
Chalaza
Hilum
Nucellus
Xenia and metaxenia are related to
Only endosperm
Pollen culture
Xylem and phloem
Pollen and endosperm
Moth pollinated flowers have
Inconspicuous petals with abundant pollen
Coloured petals and nectaries
White scented petals and nectaries
Conspicuous coloured petals
Pollination by ants is
entomophily
Myrmecophily
Malacophily
ornithophily
Assertion: Megaspore mother cell undergoes meiosis to produce four megaspores
Reason: Megaspore mother cells and megaspores both are haploid
Assertion is true but, Reason is false
The Assertion and Reason are true but Reason is not correct explanation of Assertion
Assertion is false but, Reason is true
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
A mature male gametophyte is formed from pollen mother cell by
Two meiotic divisions
One meiotic and two mitotic divisions
One meiotic division
Three meiotic divisions
Ovule is .... .. {MHTCET 2010]
Megasporophyll
Megasporangium
Rolled megasporophyll
Integumented megasporangium
Proximal end of the filament of stamen is attached to the
Placenta
Connective
Anther
Thalamus or petal
Which pair has haploid nature
Egg cell and antipodal cells
Nucellus and antipodal cells
Megaspore mother cell and antipodal cells
Egg nucleus and secondary nucleus
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
Wind
Water
bee
Bat
Match and find the correct combination
a) Pollen grains
d) Microsporangia
b) Pollen sacs
e) Microspores
c) Stamens
f) Microsporophylls
a - f, b - d, c - d
a - e, b - d, c - f
a - d, b - f, c - e
a - d, b - e, c - f
In chiropterophily, pollination is performed by
Bats
squirrels
Birds
Insects
A number of fruitlets (seeds) of Strawberry are removed randomly during development of fruit
A seedless fruit is formed
Normal fruit with fewer seeds is formed
Fruit stops development
Distorted fruit with under-developed portions is formed
The tenuinucellate ovule has
Chalazal nucellus
Small amount of nucellus
Micropylar nucellus
Large amount of nucellus
Which of the following statements about sporopollenin is wrong
Exine is formed of sporopollenin
Sporopollenin is not degraded by any known enzyme
Sporopollenin occurs in the area of germ pores only
Sporopollenin can withstand high temperature and strong acids
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Sexual Reproduction in Flowering Plants