NEET Biology - Sexual Reproduction in Flowering Plants
Exam Duration: 60 Mins Total Questions : 30
The male reproductive whorl of the flower is
- (a)
stamen
- (b)
carpel
- (c)
calyx
- (d)
corolla
The dithecous anther is
i.in transverse section, it is four sided structure
ii.consisting of four microsporangia located at the corners
iii.tetra sporangiate
- (a)
i&ii correct
- (b)
ii&iii correct
- (c)
i&iii correct
- (d)
i,ii&iii correct
Which one becomes the primary endosperm cell?
- (a)
Synergids
- (b)
Egg cell
- (c)
Central cell
- (d)
Antipodial cells
Haustorium is the
- (a)
basal suspensor cell
- (b)
the terminal embryo cell
- (c)
the first suspensor cell at micropyle
- (d)
the lower most suspensor cell
double fertilisation involves
- (a)
synergids
- (b)
triple fusion
- (c)
both 1 & 2
- (d)
mesogamy
Perisperm may differ from endosperm in
- (a)
Being a haploid tissue
- (b)
Having no reserve food
- (c)
Being a diploid tissue
- (d)
Its formation by fusion of secondary nucleus with several sperms
Filiform apparatus is characteristic of
- (a)
Nucellar embryo
- (b)
Aleurone cell
- (c)
Synergids
- (d)
Generative cell
Male gametophyte of angiosperms is shed as
- (a)
Four celled pollen grain
- (b)
Three celled pollen grain
- (c)
Microspore mother cell
- (d)
Anther
Pollination occurs in
- (a)
Bryophytes and angiosperms
- (b)
Pteridophytes and angiosperms
- (c)
Angiosperms and gymnosperms
- (d)
Angiosperms and fungi
Which of the following pair has haploid structures?
- (a)
Nucellus and anti podial cells
- (b)
Anti podial cells and egg cell
- (c)
Anti podial cells and megaspore mother cell
- (d)
Nucellus and primary endosperm cell
In angiosperms, microsporogenesis and megasporogenesis
- (a)
occur in anther
- (b)
form gametes without further divisions
- (c)
involve meiosis
- (d)
occur in ovule
Total number of meiotic divisions required for forming 100 zygotes/100 grains of wheat are
- (a)
100
- (b)
75
- (c)
125
- (d)
50
In a flowering plant, archesporium gives rise to
- (a)
only tapetum and sporogenous cells
- (b)
only the wall of the sporangium
- (c)
both wall and the sporogenous cells
- (d)
wall and the tapetum
Which type of association is found in between entomophilous flower and pollinating agent?
- (a)
Mutualis
- (b)
Commensalism
- (c)
Cooperation
- (d)
Co-evolution
Fertilisation involving carrying of male gametes by pollen tube is
- (a)
porogamy
- (b)
siphonogamy
- (c)
chalazogamy
- (d)
syngonogamy
Nonessential floral organs in a flower are
- (a)
sepals and petals
- (b)
anther and ovary
- (c)
stigma and filament
- (d)
petals only
Which of the following statements regarding the structure of microsporangium are correct?
(i)Microsporangium is generally surrounded by four wall layers - epidermis, endothecium, middle layers and tapetum.
(ii)Outer three layers perform functions of protection and dehiscence of anthers.
(iii)Cells of tapetum undergo meiosis and produce microspore tetrads.
- (a)
(i) and (ii)
- (b)
(ii) and (iii)
- (c)
(i) and (iii)
- (d)
(i), (ii) and (iii)
Study of pollen grains is called
- (a)
micrology
- (b)
anthology
- (c)
palynology
- (d)
pomology.
The given figure represents
- (a)
megaspore
- (b)
microspore
- (c)
microsporophyll
- (d)
microsporangium.
Refer to the given characteristics of some flowers:
(i) Light and non-sticky pollen grains
(ii) Exserted stigmas and anthers
(iii) Large, often feathery stigmas
(iv) Flowers colourless, odourless and nectarless
(v) Common in grasses
Above features are the characteristics of
- (a)
anemophily
- (b)
hydrophily
- (c)
entomophily
- (d)
zoophily
Spiny or sticky pollen grains and large, attractively coloured flowers are associated with
- (a)
hydrophily
- (b)
entomophily
- (c)
ornithophily
- (d)
anemophily
Pollen kitt is generally found in
- (a)
anemophilous flowers
- (b)
entomophilous flowers
- (c)
ornithophilous flowers
- (d)
malacophilous flowers
Heterostyly as a contrivance for cross-pollination is found in
- (a)
Pennisetum
- (b)
Impatiens
- (c)
Primula vulgaris
- (d)
Oenothera
Growth of part X is
- (a)
chemotropic
- (b)
thigmotaxis
- (c)
geotropic
- (d)
none of these
Fusion of one of the male gametes with egg nucleus is referred to as
- (a)
generative fertilisation
- (b)
syngamy
- (c)
vegetative fertilisation
- (d)
both (a) and (b)
Father of Indian embryology is
- (a)
P.Maheshwari
- (b)
Swaminathan
- (c)
R.Misra
- (d)
Butler.
Which of the given statements are true?
(i) During the development of a dicot embryo, heart-shaped embryo is followed by globular embryo.
(ii) The part of embryonal axis above the level of cotyledons is epicotyl, while the part below the level of cotyledons is hypocotyl.
(iii) Monocot seeds possess a single cotyledon represented by scutellum.
- (a)
(i) and (ii)
- (b)
(ii) and (iii)
- (c)
(i) and (iii)
- (d)
(i), (ii) and (iii)
Pollen grains that would easily germinate on stigma are found to germinate in vitro, only when 10-200 ppm of boric acid is added. This suggest that
- (a)
boron accelerates protein synthesis in pollen grain
- (b)
boron has an abrasive effect on the exine
- (c)
boric acid serves as a solvent for sporopollenins
- (d)
pollen wall is boron deficient and high levels of boron occur in the style and stigma
During microsporogenesis, meiosis occurs in
- (a)
endothecium
- (b)
microspore mother cells
- (c)
microspore tetrads
- (d)
pollen grains
Even in absence of pollinating agents seed-setting is assured in
- (a)
Commelina
- (b)
Zostera
- (c)
Salvia
- (d)
Fig