2010
NEET
MCQ
AIPMT 2010 Mains
Vegetative propagation in Pistia occurs by
A.
stolon
B.
offset
C.
runner
D.
sucker.
2010
NEET
MCQ
AIPMT 2010 Mains
Examine the figures (A-D) given below and
select the right option out of (a – d), in which
all the four structures A, B, C and D are
identified correctly.
A.
A $ \to $ offset, B $ \to $ Antheridiophore, C $ \to $ Antipodals, D $ \to $ Oogonium
B.
A $ \to $ Rhizome, B $ \to $ Sporangiophore, C $ \to $ Polar cell, D $ \to $ Globule
C.
A $ \to $ Sucker, B $ \to $ Seta, C $ \to $ Megaspore mother cell
, D $ \to $ Gemma
cup
D.
A $ \to $ Runner, B $ \to $ Archegoniophore, C $ \to $ Synergidl, D $ \to $ Antheridium
2010
NEET
MCQ
AIPMT 2010 Prelims
Apomictic embryos in Citrus arise form
A.
synergids
B.
maternal sporophytic tissue in ovule
C.
antipodal cells
D.
diploid egg.
2010
NEET
MCQ
AIPMT 2010 Prelims
Transfer of pollen grains from the another to the stigma of another flower of the same plant is called
A.
xenogamy
B.
geitonogamy
C.
karyogami
D.
autogamy.
2010
NEET
MCQ
AIPMT 2010 Prelims
Wind pollinated flowers are
A.
small, brightly coloured, producing large number of pollen grains
B.
small, producing large number of dry pollen grains
C.
large producing abundant nectar and pollen
D.
small, producing nectar and dry pollen.
2009
NEET
MCQ
AIPMT 2009
Vegetative propagation in mint occurs by
A.
offset
B.
rhizome
C.
sucker
D.
runner.
2008
NEET
MCQ
AIPMT 2008
What does the filiform apparatus do at the entrance into ovule?
A.
In brings about opening of the pollen tube.
B.
It guides pollen tube from a synergid to egg.
C.
It helps in the entry of pollen tube into a synergid.
D.
It prevents entry of more than one pollen tuve into the embryo sac.
2008
NEET
MCQ
AIPMT 2008
Unisexuality of flowers prevents
A.
geitonogamy, but not xenogamy
B.
autogamy and geitonogamy
C.
autogamy, but not geitonogamy
D.
both geitonogamy and xenogamy.
2008
NEET
MCQ
AIPMT 2008
Which one of the following pairs of plant structures has haploid number of chromosomes ?
A.
Nucellus and antipodal cells
B.
Egg nucleus and secondary nucleus
C.
Megaspore mother cell and antipodal cells
D.
Egg cell and antipodal cells
2008
NEET
MCQ
AIPMT 2008
Which one of the following is resistant to enzyme action?
A.
Pollen exine
B.
Leaf cuticle
C.
Cork
D.
Wood fibre
2007
NEET
MCQ
AIPMT 2007
Two plants can be conclusively said to belong to the same species if they
A.
have more than 90 percent similar genes
B.
look similar and possess identical secondary metabolites
C.
have same number of chromosomes
D.
can reproduce freely with each other and form seeds.
2007
NEET
MCQ
AIPMT 2007
Which one of the following is surrounded by a callose wall?
A.
Male gamete
B.
Egg
C.
Pollen grain
D.
Microspore mother cell
2007
NEET
MCQ
AIPMT 2007
Male gametes in angiosperms are formed by the division of
A.
generative cell
B.
vegetative cell
C.
microspore mother cell
D.
microspore.
2006
NEET
MCQ
AIPMT 2006
The arrangement of the nuclei in a normal embryo sac in the dicot plants is
A.
3 + 3 +2
B.
2 + 4 + 2
C.
3 + 2 + 3
D.
2 + 3 + 3
2006
NEET
MCQ
AIPMT 2006
Parthenocarpic tomato fruits can be produced by
A.
treating the plants with phenylmercuric acetate
B.
removing androcium of flowers before pollen grains are released
C.
treating the plants with low concentrations of gibberellic acid and auxins
D.
raising the plants from vernalized seeds.
2006
NEET
MCQ
AIPMT 2006
In a cereal grain the single cotyledon of embryo is represented by
A.
coleoptile
B.
coleorhiza
C.
scutellum
D.
prophyll.
2005
NEET
MCQ
AIPMT 2005
In a type of apomixis known as advice embryony, embryos develop directly from the
A.
nucellus or integuments
B.
zygote
C.
synergids or antipodals in an embryo sac
D.
accessory embryo sacs in the ovule.
2005
NEET
MCQ
AIPMT 2005
Through which cell of the embryo sac, does the pollen tube enter the embryo sac?
A.
Egg cell
B.
Persistant synergid
C.
Degenerated synergids
D.
Central cell
2005
NEET
MCQ
AIPMT 2005
Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?
A.
Amphitropous
B.
Circinotropous
C.
Atropous
D.
Anatropous
2004
NEET
MCQ
AIPMT 2004
An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is
A.
hemitropous
B.
campylotropous
C.
anatropous
D.
orthotropous.
2004
NEET
MCQ
AIPMT 2004
Anthesis is a phenomenon which refers to
A.
reception of pollen by stigma
B.
formation of pollen
C.
development of anther
D.
opening of flower bud.
2004
NEET
MCQ
AIPMT 2004
When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is
A.
tetraploidy
B.
pentaploidy
C.
diploidy
D.
triploidy
2003
NEET
MCQ
AIPMT 2003
In a flowering plant, archesporium gives rise to
A.
only the wall of the spoeangium
B.
both wall and the sporogenous cells
C.
wall and the tapetum
D.
only tapetum and sporogenous cells.
2002
NEET
MCQ
AIPMT 2002
What is the direction of micropyle in anatropous ovule?
A.
Upwards
B.
Downward
C.
Right
D.
Left
2002
NEET
MCQ
AIPMT 2002
In angiosperm all the four microspores of tetrad are covered by a layer which is formed by
A.
pectocellulose
B.
callose
C.
cellulose
D.
sporopollenin.
2002
NEET
MCQ
AIPMT 2002
In angiosperms pollen tube liberate their male gametes into the
A.
central cell
B.
antipodal cells
C.
egg cell
D.
synergids.
2001
NEET
MCQ
AIPMT 2001
Anemophily type of pollination is found in
A.
Salvia
B.
bottle brush
C.
Vallisneria
D.
coconut.
2001
NEET
MCQ
AIPMT 2001
In grasses what happens in microspore mother cell for the formation of mature pollen grains?
A.
One meiotic and two mitotic divisions
B.
One meiotic and one mitotic divisions
C.
One meiotic
D.
One Mitotic division
2001
NEET
MCQ
AIPMT 2001
Adventive embryony in Citrus is due to
A.
nucellus
B.
integuments
C.
zygotic embryo
D.
fertilized egg.
2000
NEET
MCQ
AIPMT 2000
Eight nucleated embryo sac is
A.
only monosporic embryo sac is
B.
only bisporic
C.
only tetrasporic
D.
any of these.
2000
NEET
MCQ
AIPMT 2000
Endosperm is formed during the double fertilization by
A.
two polar nuclei and one male gamete
B.
one polar nuclei and one male gamete
C.
ovum and male gamete
D.
two polar nuclei and two male gametes.