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Sexual Reproduction In Flowering Plants

307 Questions Start Errorless Test
All Exams Allen Errorless
Q276 Errorless 7. NCERT(Exemplar Questions) MCQ
The outermost and innermost wall layers of microsporangium in an anther are respectively
A.
Endothecium and tapetum
B.
Epidermis and endodermis
C.
Epidermis and middle layer
D.
Epidermis and tapetum
Q277 Errorless 7. NCERT(Exemplar Questions) MCQ
In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be [NCERT]
A.
Haploid
B.
Diploid
C.
A few haploid and a few diploid
D.
With varying ploidy
Q278 Errorless 7. NCERT(Exemplar Questions) MCQ
From among the sets of term given below, identify those that are associated with the gynoecium
A.
Stigma, ovule, embryo sac, placenta
B.
Thalamus, pistil, style, ovule
C.
Ovule, ovary, embryo sac, tapetum
D.
Ovule, stamen, ovary, embryo sac
Q279 Errorless 7. NCERT(Exemplar Questions) MCQ
Starting from the innermost part, the correct sequence of parts in an ovule are [NCERT]
A.
Egg, nucellus, embryo sac, integument
B.
Egg, embryo sac, nucellus, integument
C.
Embryo sac, nucellus, integument, egg
D.
Egg, integument, embryo sac, nucellus
Q280 Errorless 7. NCERT(Exemplar Questions) MCQ
From the statements given below choose the option that are true for a typical female gametophyte of a flowering plant
(i) It is 8-nucleate and 7-celled at maturity
(ii) It is free-nuclear during the development
(iii) It is situated inside the integument but outside the nucellus
(iv) It has an egg apparatus situated at the chalazal end [NCERT Pg. No. 11]
A.
(i) and (iv)
B.
(ii) and (iii)
C.
(i) and (ii)
D.
(ii) and (iv)
Q281 Errorless 7. NCERT(Exemplar Questions) MCQ
Autogamy can occur in a chasmogamous flower if
A.
Pollen matures before maturity of ovule
B.
Ovules mature before maturity of pollen
C.
Both pollen and ovules mature simultaneously
D.
Both anther and stigma are of equal lengths
Q282 Errorless 7. NCERT(Exemplar Questions) MCQ
Choose the correct statement from the following
A.
Cleisfogamous flowers always exhibit autogamy
B.
Chasmogamous flowers always exhibit geitonogamy
C.
Cleistogamous flowers exhibit both autogamy and geitonogamy
D.
Chasmogamous flowers never exhibit autogamy
Q283 Errorless 7. NCERT(Exemplar Questions) MCQ
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by
A.
Insects
B.
Water
C.
Wind
D.
Animals
Q284 Errorless 7. NCERT(Exemplar Questions) MCQ
From among the situations given below, choose the one that prevents both autogamy and geitonogamy
A.
Monoecious plant bearing unisexual flowers
B.
Dioecious plant bearing only male or female flowers
C.
Monoecious plant with bisexual flowers
D.
Dioecious plant with bisexual flowers
Q285 Errorless 7. NCERT(Exemplar Questions) MCQ
In a fertilised embryo sac, the haploid, diploid and triploid structures are [NCERT Pg. No. 18]
A.
Synergid, zygote and primary endosperm nucleus
B.
Synergid, antipodal and polar nuclei
C.
Antipodal, synergid and primary endosperm nucleus
D.
Synergid, polar nuclei and zygote
Q286 Errorless 7. NCERT(Exemplar Questions) MCQ
In an embryo sac, the cells that degenerate after fertilisation are [NCERT]
A.
Synergids and primary endosperm cell
B.
Synergids and antipodals
C.
Antipodals and primary endosperm cell
D.
Egg and antipodals
Q287 Errorless 7. NCERT(Exemplar Questions) MCQ
While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant
A.
Bagging of female flower
B.
Dusting of pollen on stigma
C.
Emasculation
D.
Collection of pollen
Q288 Errorless 7. NCERT(Exemplar Questions) MCQ
In the embryos of a typical dicot and a grass, true homologous structures are
A.
Coleorhiza and coleoptile
B.
Coleoptile and scutellum
C.
Cotyledons and scutellum
D.
Hypocotyl and radicle
Q289 Errorless 7. NCERT(Exemplar Questions) MCQ
The phenomenon observed in some plants wherein parts of the sexual apparatus is used for forming embryos without fertilisation is called
A.
Parthenocarpy
B.
Apomixis
C.
Vegetative propagation
D.
Sexual reproduction
Q290 Errorless 8. Critical Thinking MCQ
See the following figure and identify A, B, C, D and E are respectively
A.
Stigma, Anther, Embryo sac, Egg and Female gametophyte
B.
Stigma, Anther, Male gametophyte, Fertilized egg and Female gametophyte
C.
Stigma, Anther, Female gametophyte, Egg and Male gametophyte
D.
Stigma, Anther, Male gametophyte, Egg and Female gametophyte
Q291 Errorless 8. Critical Thinking MCQ
The given figure A and B show female reproductive organs of Papaver and Michelia respectively[NCERT Pg. No. 9]
A.
A - Multicarpellary syncarpous pistil and B - Multicarpellary apocarpous pistil
B.
A - Multicarpellary apocarpous pistil B - Multicarpellary syncarpous pistil
C.
Both A and B are multicarpellary syncarpous pistils
D.
Both A and B are multicarpellary apocarpous pistil
Q292 Errorless 8. Critical Thinking MCQ
G, and ${ \sf G } _ { 2 }$ are genetically identical because [NCERT]
A.
They are products of meiosis I
B.
They are products of amitosis
C.
They are products of meiosis
D.
They are products of mitosis
Q293 Errorless 8. Critical Thinking MCQ
Identify the components labelled A, B, C and D in the given figure from the list I to VIII

(I)Micropyle
(II) Chalaza D
(III) Central cell
(IV) PEN B
(V) PEC VI. Megaspore
(VII) Degenerating synergid
(VIII) Degenerating antipodal cell
A.
I, VIII, II, III
B.
ā…”,I ,VIII, III ,I
C.
VI ,IV, VII, III
D.
VI, IV ,VII ,V
Q294 Errorless 8. Critical Thinking MCQ
Identify all the four parts A, B, C and D in the given diagram [NCERT Pg. No. 19]
A.
A-Hypophysis, B-Coleoptile, C-Radicle, D-Coleorhiza
B.
A-Hypophysis, B-Coleorhiza, C-Radicle, D-Coleoptile
C.
A-Scutellum, B-Coleorhiza, C-Radicle, D-Coleoptile
D.
A-Scutellum, B-Coleoptile, C-Radicle, D-Coleorhiza
Q295 Errorless 8. Critical Thinking MCQ
Select the right option in which the edible part (A, B, C and D) shown in the figure is correctly identified
A.
D - Endocarp
B.
C = Epicarp + Mesocarp
C.
B -Thalamus
D.
A- Seed
Q296 Errorless 8. Critical Thinking MCQ
In the given figure of strawberry fruit, identify A and B [NCERT Pg. No. 21]
A.
A - Mesocarp, B - Drupe
B.
A - Thalamus, B - Achene
C.
A - Thalamus, B - Pome
D.
A - Endocarp, B ā€“ Pome
Q297 Errorless 8. Critical Thinking MCQ
Double fertilization
A.
Fusion of two male gametes of a pollen tube with two different eggs
B.
Fusion of one male gamete with two polar nuclei
C.
Fusion of two male gametes with one egg
D.
Syngamy and triple fusion
Q298 Errorless 8. Critical Thinking MCQ
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is
A.
Geitonogamy
B.
Chasmogamy
C.
Cleistogamy
D.
Xenogamy
Q299 Errorless 8. Critical Thinking MCQ
Identify the set of correct statement
(A) The flowers of Vallisneria are colourful and produce nectar.
(B) The flowers of waterlily are not pollinated by water
(C) In most of water-pollinated species, the pollen grains are protected from wetting
(D) Pollen grains of some hydrophytes are long and ribbon like.
(E) In some hydrophytes, the pollen grains are carried passively inside water.
A.
C, D and E only
B.
A, B, C and D only
C.
A, C, D and E only
D.
B, C, D and E only
Q300 Errorless 9. Self Evaluation Test MCQ
Heteroblastic means
A.
Development of male and female structures on the same plant
B.
Development of male and female structures on different plants
C.
Vegetative and reproductive growth in different seasons
D.
Vegetative structure of young and old plants is different