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Sexual Reproduction In Flowering Plants

554 Questions Start Allen Test
All Exams Allen Errorless
Q526 Errorless 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
Q527 Errorless 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)
Q528 Errorless 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
Q529 Errorless 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
Q530 Errorless 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
Q531 Errorless 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
Q532 Errorless 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
Q533 Errorless 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
Q534 Errorless 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
Q535 Errorless 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
Q536 Errorless 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
Q537 Errorless 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
Q538 Errorless 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
Q539 Errorless 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
Q540 Errorless 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
Q541 Errorless 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
Q542 Errorless 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
Q543 Errorless 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
Q544 Errorless 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
Q545 Errorless 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
Q546 Errorless 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
Q547 Errorless 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
Q548 Errorless Assertion and Reason MCQ
Assertion : Pollen grain reaches directly to the egg, which is seated deep in the ovarian cavity. Reason: To effect fertilization, the pollen grains germinate on the stigma.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
Q549 Errorless Assertion and Reason MCQ
Assertion : Cellular endosperm is formed by both nuclear division and wall formation. Reason: It lacks haustoria.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
Q550 Errorless Assertion and Reason MCQ
Assertion : Chasmogamous flowers require pollinating agents. Reason: Cleistogamous flowers do not expose their sex organs. [NCERT Pg. No. 12]
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.