21.
Passage of pollen tube through micropyle while reaching the embryo sac is
A
dicliny
B
dichogamy
C
mesogamy
D
porogamy
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Passage of pollen tube through micropyle while reaching the embryo sac is
dicliny
dichogamy
mesogamy
porogamy
Part which is grafted or the stump of another is
graft
bulbil
scion
stock
Mesogamy is
Entry of pollen tube through integument
Fusion of similar male and female gametes
None of the above
Fusion of morphologically different but physiologically similar gametes
Largest cell of ovule is
Antipodal cell
Size of cells variable
Central cell
Megaspore mother cell
Intraspecific incompatibility is overcome by
Welting of anthers
Wetting of stigmas
Mixed pollination
Self pollination
In plant part having two generations is
unfertilized ovule
seed
embryo germinated
pollen grain
In Casuarina fertilization occurs through
apogamy
porogamy
chalazogamy
mesogamy
In a type of apomixis called adventive embryony embryos develop directly from
zygote nucellus or integument
Accessory embryo sacs
in the ovule
synergids or antipodals of embryo sac
Heterozygosity is produced following
geitonogamy
autogamy
xenogamy
cleistogamy
Function of tapetum is
Respiratory
Protective
Nutritive
All the above
Function of guiding and attracting pollen tube is done by
synergids
antipodal cells
secondary nucleus
egg cell
Formation of embryo directly from nucellus and integument is
Apospory
Apomixis
Apogamy
Adventitive polyembryony
Entry of pollen tube through chalazal end is
syngamy
porogamy
basigamy
mesogamy.
Endosperm is completely consumed by the developing embryo in Pea and Groundnut
Maize and Castor
Castor and Groundnut
Maize and Pea
Pea and Groundnut
Embryo sac is
megagametophyte
microsporangium
megasporangium
microgametophyte
Egg apparatus consists of
egg and antipodals
egg and synergids
polar nuclei
egg
Effect of pollen on character of pericarp and seed coat is
metaxenia
xenia
chimera
ruminate endosperm
Double fertilization involves
Fertilization of egg and central cell by two sperms brought by same pollen
tube fertilization of two eggs in the same embryo sac by two sperms
brought by one pollen tube fertilization of an egg by two male gametes
fertilization of egg and central cell by two sperms brought by two different pollen tubes
Device for self pollination is
heterostyly
none of the above
unisexuality
dicliny
Cleistbgamous flowers are
Insect pollinated
Wind pollinated
Self pollinated
Bird pollinated