21.
Function of tapetum is
A
Respiratory
B
Protective
C
Nutritive
D
All the above
Answer and explanation
Correct Answer: C — Nutritive
nutritive
ObjectiveMcq
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Function of tapetum is
Respiratory
Protective
Nutritive
All the above
nutritive
Function of guiding and attracting pollen tube is done by
synergids
antipodal cells
secondary nucleus
egg cell
synergids
Formation of embryo directly from nucellus and integument is
Apospory
Apomixis
Apogamy
Adventitive polyembryony
adventitive polyembryony
Entry of pollen tube through chalazal end is
syngamy
porogamy
basigamy
mesogamy.
basigamy
Endosperm is completely consumed by the developing embryo in Pea and Groundnut
Maize and Castor
Castor and Groundnut
Maize and Pea
Pea and Groundnut
Maize and Castor
Embryo sac is
megagametophyte
microsporangium
megasporangium
microgametophyte
megagametophyte
Egg apparatus consists of
egg and antipodals
egg and synergids
polar nuclei
egg
egg and synergids
Effect of pollen on character of pericarp and seed coat is
metaxenia
xenia
chimera
ruminate endosperm
metaxenia
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
Fertilization of egg and central cell by two sperms brought by same pollen tube
Device for self pollination is
heterostyly
none of the above
unisexuality
dicliny
none of the above
Cleistbgamous flowers are
Insect pollinated
Wind pollinated
Self pollinated
Bird pollinated
self pollinated
Bird pollination is
myrmecophily.
chiropterophily
ornithophily
malacophily
ornithophily
Bicarpeliary gynaecium and oblique ovary occurs in
Banana
Mustard
Brinjal
Pisum
Brinjal
Arrangement of nuclei in normal dicot embryo sac is
2+3+3
3+2+3
2+4+2+
3+3+2
3+2+3
Anthesis is
reception of pollen by stigmas
formation of pollen
development of anther
opening of floral bud
opening of floral bud
Anther represents
Spermatogonia
Male gametophyte
Male sporophyll
Female gametophyte
male sporophyll
Anemophily occurs in
Vallisnaria
Bottle brush
Coconut
Salvia
Coconut
An advantage of cleistogamy is
Each visit of pollinator brings hundreds of pollen grains
Seed set is not dependent on pollinators
It leads to diversity
Seed dispersal is more efficient and widespread
seed set is not dependent on pollinators
A diploid female plant is crossed with tetraploid male. The ploidy of endosperm will be
Diploidy
Pentaploidy
Tetraploidy
Triploidy
Tetraploidy