24 Sexual Reproduction in Flowering Plants Questions
The end products of sexual reproduction is/ are –
A) Fruit B) Seeds C) Flower D) A & B both
Floriculture deals with –
A) Flower B) Seed culture C) Fruit D) Both B & C
| (a) | (b) | (c) | (d) | |
| A | Style | Filament | Stigma | Ovary |
| B | Filament | Style | Ovary | Stigma |
| C | Filament | Style | Thalamus | Anther |
| D | Style | Filament | Stigma | Ovule |
Choose incorrect statement –
A) Several hormonal & structural changes are initiated which lead to redifferentiation and further development of the floral primordium.
B) Inflorescences are formed which bear the floral buds and then the flower
C) In the flower male and female reproductive structures, the androecium and the gynoecium
differentiate and develop
D) None of these
Reproductive organ of flower doesnot comprises-
A) Androecium B) Stamen C) Gynoecium D) Tepals
A typical angiosperm anther is _______ with each lobe having _______ theca i.e. they are ______
A) Bilobed, two, dithecous
B) Dithecous, two, bilobed
C) Bilobed , four, dithecous
D) Dithecous, four, bilobed
Often theca is separated by
A) Transverse groove
B) Longitudinal groove
C) Diagonal groove
D) All of these
The dithecous consist of ______microsporangia located at the corners,________ in each lobe.
A) Two, one
B) Two, two
C) Four, two
D) Both A & C
Arrange microsporangial wall in sequence of outside to inside
A) Epidermis, middle layer, endothecium, tapetum
B) Epidermis, endothecium, middle layer, tapetum
C) Epidermis, middle layer, tapetum, endothecium
D) Endothecium, middle layer, tapetum, epidermis
How many of microsporangial wall perform function of protection and help in dehiscence of anther to release pollen
A) 1
B) 2
C) 3
D) 4
________ is responsible for nourishment of pollen grain.
A) Tapetum
B) Endothecium
C) Epidermis
D) Middle layer
Which of the following undergo meiotic division to form microspore tetrad
A) Sporogenous tissue
B) Generative tissue
C) Microspore
D) A & B
a |
B |
C |
d |
e |
|
| A | Tapetum | Microspore mother cell | endothecium | epidermis | Middle layer |
| B | Tapetum | Microspore mother cell | epidermis | endothecium | Middle layer |
| C | Tapetum | Middle layer | Microspore mother cell | endothecium | epidermis |
| D | epidermis | Middle layer | Microspore mother cell | endothecium | Tapetum |
Microsporogenesis –
A) Process of formation of microspore
B) Development of pollen grain from pollen mother cell
C) It involve meiosis
D) All of these
Pollen grain represents –
A) Male gametophyte
B) Male sporophyte
C) Female gametophyte
D) Female sporophyte
Choose correct about pollen grain walli)
i) It has two layered prominent wall
ii) Hard outer layered prominent wall
iii) Exine is composed of sporopollenin
iv) Sporopollenin form continuous exine
A) i, ii, iii, iv B) i, ii, iii C) i, iii D) i & iv
Sporopollenin is absent in –
A) Intine B) Germpore C) Exine D) A & B both
Pollen grains are well preserved as fossil because of
A) Presence of intine
B) Presence of germpore
C) Presence of sporopollenin
D) All of these
Sporopollenin is degraded by –
A) Engyme
B) High temperature
C) Strong acid & alkali
D) None of these
Inner wall of pollen grain is –
A) Intine, made up of cellulose & lignin
B) Thin discontinuous intine
C) Both A & B
D) None of these
When pollen grain mature –
A) It consist of two cell that are two male gamete only.
B) It consist of two cell that are generative & vegetative cell
C) It consist of two cell that are two male gamete arise from vegetative cell and one generative cell
D) It consist of three cell that are two male gamete develop meiotically from generative cell and one vegetative cell
Choose incorrect statement among following:
A) In over 60% of angiosperm, pollen grains are shed at 3 – cell stage
B) In over 60% of angiosperm, pollen grains are shed at 2 – cell stage
C) Both A & B
D) None of these
Pollen allergy is not correlated with-
A) Cause of parthenium
B) Cause chronic respiratory disorder
C) Carrot grass that come into India as a contaminant with imported rice
D) None of these
Pollen grain of rice is viable upto-
A) 30 min
B) Several month
C) Same as in sonaceae
D) Both B & C
Which temperature is correct to store semen for artificial insemination-
A) 196°C B) -196°C C) 34°C D) 4°C
Papaver show
i) Multicarpellary
ii) Apocarpous
iii) Syncarpous
iv) Monocarpellary
A) i, ii B) i, iii C) iv, ii D) iv, iii
Given diagram is of –
A) Multicarpellary apocarpous gynoecium of michelia
B) Multicarpellary synocarpous gynoecium of michelia
C) Multicarpellary synocarpous gynoecium of papaver
D) Multicarpellary apocarpous gynoecium of papaver
Which of following serves as a landing platform for pollen grain?
A) Stigma
B) Style
C) Anther
D) Filament
Choose correct statement:
A) Inside the ovary is the ovarian cavity, also known as lodicule
B) Megasporangia is commonly called ovules
C) The placenta is located outside ovarian cavity
D) A & C both
Choose incorrect statement –
A) The number of ovules in an ovary is one in paddy
B) The number of ovules in an ovary is many in papaya
C) The number of ovules in an ovary is one in orchid
D) Wheat mango consist of one ovule
Ovule is attached to placenta by –
A) Funicle
B) Integument
C) Hilum
D) Nucellus
Hilum represents the junction between
A) Ovule & ovary
B) Ovule & funicle
C) Ovule & integument
D) None of these
Chalaza end represent –
A) Basal part of ovule
B) Apical part of ovule
C) Basal part of ovary
D) Apical part of ovary
Female gametophyte of angiosperm represented by –
A) Nucellus
B) Embryosac
C) Integument
D) Both A & B
An ovile generally has ______ embryo sac formed from a megaspore through ________ division
A) Single, equational
B) Single, reductional
C) Four, meiotic
D) Four, mitotic
Megasporogenesis is not related to –
A) Formation of megaspore from megaspore mother cell
B) MMC undergoes meiotic division for megaspore
C) Formation of microspore
D) Both A & C
Ovules generally differentiate a single megaspore mother cell in –
A) Chalazal end
B) Micropylar region
C) Both A & B
D) Integument
In a majority of flowering plants
A) One of the megaspore is functional while other three degenerate
B) All four megaspore can develops into female gametophyte in almost all angiosperm
C) Three megaspore is functional while other one degenerated
D) Both A & B
Monosporic embryo development involve –
A) One functional megaspore
B) One haploid cell formed in egg apparatus
C) Four functional megaspore
D) None of these
Choose correct statement –
A) The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2-nucleate embryo sac
B) Two more sequential mitotic nuclear division in 2-nucleate embryo sac result in formation of 4- nucleate
C) Mitotic division in embryo sac formation upto 8-celled is strictly free nuclear
D) All of these
How many of eight nuclei of typical embryosac is surrounded by cell wall
A) 2
B) 4
C) 6
D) 7
Central cell of typical embryosac is situated –
A) Below egg apparatus
B) Above egg apparatus
C) At chalazal end
D) None of these
Choose the correct about egg apparatus of typical embryosac
A) Situated at micropylar end
B) Consist of three cells
C) Both A & B
D) Consist of all cells having special cellular thickening at micropylar tip
Typical embryo-sac of angiosperm at maturity is –
A) 8 celled, 8 nucleate
B) 7 celled, 8 nucleate
C) 8 celled, 7 nucleate
D) 7 celled, 7 nucleate
a |
b |
c |
d |
e |
f |
|
| A | Antipodal | Polas nuclei | Central cell | Egg | Synergid | Filiform apparatus |
| B | Antipodal | Polas nuclei | Embryo sac | Egg | Synergid | Filiform apparatus |
| C | Antipodal | Polas nuclei | Egg | Embryo sac | Filiform apparatus | Synergid |
| D | Antipodal | Central cell | Polas nuclei | Egg | Filiform apparatus | Synergid |
Pollination is-
A) transfer of motile pollen to stigma
B) transfer of non-motile anther to stigma
C) transfer of motile anther to stigma
D) transfer of non-motile pollen to stigma
Transfer of pollen from anther to stigma of same flower is called-
A) Autogamy
B) Geitonogany
C) Xenogeny
D) None of these
Read the given statements-
(i) Autogamy cannot occur in open flower.
(ii) Geitonogany cannot occur in closed flower.
Choose the appropriate answer-
A) (i) is correct but (ii) is wrong
B) (i) is wrong but (ii) is correct
C) (i) and (ii) are both correct
D) (i) and (ii) are both wrong
Complete autogamy is rare in-
A) Closed flower
B) Open flower
C) Both open and closed flower
D) Neither open nor closed flower
Flowers that do not open at all are called
A) Chasmogamous
B) Polygamous
C) Cleistogamous
D) Xenogamous
Oxalis produce-
A) Cleistogamous flowers
B) Chasmogamous flowers
C) Both (A) and (B)
D) Can’t say
How many of the given characters are necessarily present in cleistogamous flower.
(i) Anthex and stigma lie close to each other.
(ii) There is synchrony in pollen release and stigma receptivity.
(iii) Lengths of anther and stigma are very different.
(iv) Flower is necessarily dioecious.
(v) Assured seed-set even without pollinators.
A) 1
B) 2
C) 3
D) 4
Geitonogamy is-
A) Functionally self-pollination and genetically cross-pollination
B) Genetically self-pollination and functionally cross-pollination
C) Cross-pollination both genetically and functionally
D) Self-pollination both genetically and functionally
Xenogamy is-
A) Functionally self-pollination and genetically cross-pollination
B) Genetically self-pollination and functionally cross-pollination
C) Cross-pollination both genetically and functionally
D) Self-pollination both genetically and functionally
Autogamy is-
A) Functionally self-pollination and genetically cross-pollination
B) Genetically self-pollination and functionally cross-pollination
C) Cross-pollination both genetically and functionally
D) Self-pollination both genetically and functionally
Genetically different type of pollen is brought to stigma by-
A) Atutogamy only
B) Geitonogamy only
C) Xenogamy only
D) More than one options
(a) Pollination by abiotic agents is a chance factor.
(b) Pollen is produced in enormous amount as compared to number of ovules.
Choose the best answer.
A) a and b are correct and b is the reason for a
B) a and b are correct and a is the reason for b
C) a is incorrect and b is correct
D) b is incorrect and a is correct
Which is more common abiotic agent for pollination-
A) Wind
B) Insect
C) Water
D) Animal
The pollen grains in wind pollinated plants should be-
A) Heavy and sticky
B) Heavy and non-sticky
C) Light and sticky
D) Light and non-sticky
Wind pollinated flowers often have ____ in each ovary and flowers are after ____.
(i) (ii)
A) Single Single
B) Multiple Single
C) Single packed in inflorescence
D) multiple packed in inflorescence
The tassels in corn cob are-
A) Filaments of anthers
B) Stigma and style
C) Reduced leaf
D) Stalk of ovule
Match the columns.
Column-I Column-II
(i) Wind pollination (a) Maize
(ii) Water pollination (b) Hydrilla
(iii) Biotic pollination (c) Monocots
(iv) Freshwater pollination (d) Amorphophallus
A) (i)-d, (ii)-b, (iii)-d, (iv)-c
B) (i)-c, (ii)-d, (iii)-a, (iv)-b
C) (i)-a, (ii)-c, (iii)-d, (iv)-b
D) (i)-b, (ii)-a, (iii)-c, (iv)-d
(a) Distribution of some bryophytes & pteridophytes is limited.
(r) Transport of male gamete in bryophytes & pteridophyte is dependent on water.
Choose the correct options.
A) a and r are correct but r is correct explanation for a
B) a and r are correct but r is not correct explanation for a
C) Both a and r are incorrect
D) a is correct but r is incorrect
Aquatic plants pollinated by water are given, except-
A) Zostera
B) Hydrilla
C) Water hyacinth
D) More than one option
Pollination in water lily occurs by-
A) Water
B) Wind
C) Insects
D) Both B and C
Choose the correct statements for pollination in sea grasses-
(i) Female flower reach surface of water.
(ii) Female flower remain submerged.
(iii) Pollen released on water surface.
(iv) Pollen release inside water.
(v) Pollen grains are carried passively by water.
(vi) Pollen grains are carried actively in water.
(vii) Most of the pollen reach stigma.
(viii) Some of the pollen reach stigma.
A) (i), (iii), (v), (vii)
B) (ii), (iv), (vi), (vii)
C) (ii), (iv), (v), (vii)
D) (ii), (iv), (v), (viii)
Choose correct statements for pollination in vallisneria-
(i) Female flower reach surface of water.
(ii) Female flower remain submerged.
(iii) Pollen released on water surface.
(iv) Pollen release inside water.
(v) Pollen grains are carried passively by water.
(vi) Pollen grains are carried actively in water.
(vii) Most of the pollen reach stigma.
(viii) Some of the pollen reach stigma.
A) (i), (iii), (v), (vii)
B) (ii), (iv), (vi), (vii)
C) (i), (iii), (v), (viii)
D) (ii), (iv) (v), (viii)
Requirement for pollen of water pollinated plants are-
(i) Light pollen (ii) Pollen with mucilagenous cover
(iii) Non-sticky pollen (iv) Long ribbon-like pollen
A) (i) and (iii)
B) (iii) and (iv)
C) (i) and (ii)
D) (ii) and (iv)
Majority of angiosperms use ____ for pollination-
A) Wind
B) Water
C) Animals
D) Both A and B
Identify the given labels-
(i) (ii)
A) Chasmogamous, autogamy Cleistogamous, allogamy
B) Chasmogamous, allogamy Cleistogamous, autogamy
C) Cleistogamous, autogamy Chasmogamous, allogamy
D) Cleistogmous, allogamy Chasmogamous, autogamy
The figure shows-
A) Wind pollination in freshwater Vallisnaria
B) Water pollination in marine Hydrilla
C) Water pollination in marine Lostera
D) Water pollination in freshwater Vallineria
Dominant biotic pollinating agents are-
A) Bees
B) Birds
C) Butterflies
D) Ants
How many of the following may act as pollinators-?
Bees, butterflies, wasps, beetles, leopard, bats, pigeon
A) 5
B) 4
C) 3
D) 2
Insect-pollinated flowers are-
A) Large, colourful, rich in nectar
B) Large, colourless, rich in nectar
C) Small, clustered, fragrant, sticky
D) More than one option is correct
Floral rewards are-
A) Nectar
B) Pollen grains
C) Both B and A
D) None of these
Floral reward in Amorphophallus is-
A) Nectar
B) Safe place to lay-eggs
C) Colourful petals
D) Fragrance to attract insects
Which of the statements is true about
(a) Pronuba moth and
(b) Yucca plant?
A) (a) is dependent on (b) for life cycle but the opposite is not true
B) (b) is dependent on a for life cycle but the opposite is not true
C) Both (a) and (b) are interdependent on each other for their life cycle
D) Both (a) and (b) are independent of each other for life cycle
Outbreeding devices are used to prevent-
A) Self-fertilization
B) Cross-pollination
C) Both self and cross pollination
D) Xenogamy
Inbreeding depression is a result of-
A) Self-fertilization followed by cross fertilization
B) Cross-fertilization followed by self fertilization
C) Continued cross-fertilization
D) Continued self-fertilization
Self-pollination can be prevented by separation of anther and stigma in-
A) time (maturity)
B) place (position)
C) none of these
D) both of these
Self-incompatibility is not-
A) Genetic mechanism
B) Positional separation of anther and stigma
C) Prevention for geitonogamy
D) More than one option
Production of unisexual flowers on a plant assures prevention of-
A) Autogamy only
B) Autogamy and geitonogamy
C) Geitonogamy only
D) Autogamy and Xenogamy
Monoecious plants assures-
A) no autogamy
B) no autogamy and geitonogamy
C) no autogamy and xenogamy
D) no geitonogamy and xenogamy
Dioecious plants assures-
A) no autogamy
B) no autogamy and geitonogamy
C) no autogamy and xenogamy
D) no geitonogamy and xenogamy
If a wrong pollen (from other species or self-incompatible) lands on stigma-
A) Pollen germinates but pollen tube cannot grow in style
B) Pollen germinates, grows in style but cannot enter ovary
C) Does not germinate at all
D) Both A and C
When pollen grain germinates and produce pollen tubes
A) Content of pollen grain is distributed uniformly
B) Content of pollen grain move into pollen tube
C) Content of pollen grain is distributed non-uniform, more in pollen grain
D) Content of pollen grain is distributed non-uniformly, more in pollen tube
Filiform apparatus is present at-
A) Micropylar part of synergid
B) Chalazal part of synergid
C) Micropylar part of antipodal
D) Chalazal part of antipodal
Emasculation is done in-
A) Male parent
B) Female parent
C) Both male and female parent
D) Depends on the project
The emasculated flowers are bagged to-
A) Protect flower from strong sunlight
B) Protect flower from rain
C) Protect flower from unwanted pollen
D) Protect flower from insects
If female parent produces unisexual flowers, there is-
A) no need of emasculation & bagging
B) need of emasculation & bagging
C) no need of emasculation but bagging is needed
D) no need of bagging but emasculation is needed
Identify the filiform apparatus in given figure-
A) I
B) II
C) III
D) IV
Pollen tube release male gametes into-
A) Cytoplasm of Egg cell
B) Nucleus of Egg cell
C) Cytoplasm of Synergids
D) Cytoplasm of Antipodals
Which of the following is incorrect about double fertilization?
A) One male gamete fuses with nucleus of egg cell
B) Syngamy results into dyad of cells
C) Second male gamete move toward polar nuclei
D) Triple fusion results into PEN
Triple fusion is-
A) Fusion of third male gamete with polar nuclei
B) Fusion of three haploid cells
C) Fusion of second male gamete with egg cell
D) Fusion of three haploid nuclei
Which of these is correct?
A) Syngamy = Triple fusion + Double fertilization
B) Double fertilization = Syngamy + Triple fusion
C) Triple fusion = Double fertilization – Syngamy
D) More than one option is correct
Central cell after double fertilization becomes-
A) Zygote
B) PEN
C) PEC
D) Embryo
Identify the correct labels.
(i) (ii) (iii)
A) Zygote PEN Degenerating antipodals
B) Zygote PEC Degenerating antipodals
C) Zygote PEN Degenerating synergids
D) Zygote PEC Dengenerating synergids
Identify the correct labels.
i |
ii |
iii |
iv |
|
| A | Globular embryo | Heart shaped
embryo |
Suspensor | Cotyledon |
| B | Heart shaped
embryo |
Globular embryo | Cotyledon | Suspensor |
| C | Globular embryo | Heart shaped
embryo |
Cotyledon | Suspensor |
| D | Heart shaped
embryo |
Globular embryo | Suspensor | Cotyledon |
The figure shows stages in-
A) Embryo development in dicot
B) Embryo development in monocot
C) Embryo development in gymnosperm
D) Both A and B
Post fertilization includes how many of the following events-
(i) endosperm development
(ii) zygote formation
(iii) embryo development
(iv) seed formation
(v) fruit formation
A) 5
B) 4
C) 3
D) 2
Select correct statement-
A) Endosperm development proceeds embryosac development
B) Endosperm development precedes embryo development
C) Embryo development precedes endosperm development
D) More than one option is correct
Endosperm tissue is-
A) Haploid
B) Diploid
C) Triploid
D) Tetraploid
In free-nuclear endosperm-
A) PEN undergoes successive nuclear divisions
B) PEC undergoes successive cellular divisions
C) PEN undergoes successive cellular divisions
D) More than one option is correct
Cells of endosperm tissue are filled with-
A) reserve food materials for plant cells
B) reserve food material for embryo
C) reserve food material for developing zygote
D) more than one option is correct
Coconut water from tender coconut is ____and white kernel is ____.
(i) (ii)
A) Cellular endosperm Free-nuclear endosperm
B) Free nuclear endosperm Cytoplasmic endosperm
C) Free-nuclear endosperm Cellular endosperm
D) Cytoplasmic endosperm Cellular endosperm
Endosperm is completely consumed by developing embryo before seed maturation in-
A) Groundnut
B) Castor
C) Coconut
D) All of these
Endosperm persists in mature seeds in-
A) Castor
B) Pea
C) Beans
D) More than one option is correct
Embryo develops at
A) micropylar end
B) chalazal end
C) either micropylar or chalazal end
D) neither microplar nor chalazal end
Choose the correct order of embryo development in dicots-
(i) Zygote (ii) Heart-shaped embryo
(iii) Mature embryo (iv) Proembryo
(v) Globular embryo
A) i-iv-ii-v-ii
B) i-iv-ii-v-iii
C) i-iv-iii-ii-v
D) ii-iv-v-ii-iii
How many of the given parts are present in dicot embryo-
Embryonal axis, Cotyledons, Scutellum, Hypocotyl, Root cap
A) 5
B) 4
C) 3
D) 2
How many of the given parts are present in monocot embryo-
Cotyledon, scutellum, Coleoptile, Radicle, Root cap
A) 5
B) 4
C) 3
D) 2
Hypocotyl terminates in-
A) Plumule
B) Radicle
C) Root tip
D) More than one option is correct
(i) In dicot embryo, root tip is covered by root cap.
(ii) In dicot embryo, scutellum is situated towards one side of embryonal axis.
(iii) Cylindrical portion below the level of cotyledons is hypocotyl in dicots embryo.
(iv) In dicot embryo, epicotyl terminates with stem tip.
How many of the above statements is incorrect?
A) Zero
B) One
C) Two
D) Three
In grass family, the scutellum is-
A) Cotyledon
B) Root tip
C) Epiblast
D) Shot tip
Identify the given figures
A) (i) is embryo of grass B)
(ii) is embryo of dicots
C) (ii) is embryo of monocot
D) More than one option is correct
Identify the correct labels-
(i) (ii) (iii)
A) Cotyledon Plumule Hypocotyl
B) Radicle Cotyledon Plumule
C) Hypocotyl Plumule Cotyledon
D) Cotyledon Plumule Epicotyl
Identify the correct labels-
(i) (ii) (iii) (iv)
A Epiblast Scutellum Coleoptile Root cap
B Scutellum Epiblast Shoot apex Radicle
C Epiblast Scutellum Root cap Shoot apex
D Scutellum Epiblast Radicle Coleoptile
Coleoptile is-
A) hollow structure
B) solid structure
C) sometimes hollow and sometimes solid structure
D) semi-solid
Coleorhiza is-
A) hollow structure
B) foliar structure
C) undifferentiated sheath
D) more than one option is correct
Read the following statements-
(i) Seed is final product of sexual reproduction is plant.
(ii) Seed is fertilized ovule.
(iii) Seed is formed inside fruit.
(iv) Seed consists of seed coat(s), cotyledon(s) and embryo axis.
How many of the statements is incorrect?
A) Zero
B) One
C) Two
D) Three
Non-albuminous seeds-
A) have residual endosperm
B) retain a part of endosperm
C) is found in castor
D) None of these
Groundnut is-
A) Albuminous
B) Non-albuminous
C) Has residual endosperm in mature seed
D) More than one option is correct
Perisperm is-
A) Persistent nucleus B) Found in beet
C) Residual endosperm D) More than one option
Integument of ovules mature into-
A) Ovary wall
B) Pericarp
C) Seed coat
D) Perisperm
Micropyle is-
A) Absent in seed
B) Present inside seed
C) Present on surface of seed
D) Present on seed coat
Micropyle plays role of-
A) Stalk for seed
B) Scar of stalk
C) Facilitating entry of water into seed
D) Facilitating escape of seed metabolites
Mature seed has-
A) More water content and more metabolism
B) Less water content and more metabolism
C) Less water content and less metabolism
D) More water content and more metabolism
The embryo in a mature seed-
A) Germinates essentially
B) May enter dormancy
C) Always enters dormancy first, followed by germination
D) Both B and C
Choose the correct match regarding the maturing of flower into fruit-
A) Wall of ovule – pericarp
B) Nucellus – periderm
C) Ovary – seed
D) None of these
Fleshy fruit is-
A) Mustard
B) Groundnut
C) Guava
D) More than one
In false fruits, select incorrect statement-
A) Floral parts other than ovary are involved
B) Thalamus may contribute to fruit formation
C) Examples include apple, cashew, groundnut
D) Fruit does not develop from ovary
Which of these is incorrect about parthenocarpy-
A) Plant formed without fertilization
B) Banana is example
C) Induced by application of growth harmones
D) Such fruits are seed less
Identify the endosperm in the given figure–
A) I
B) II
C) III
D) IV
Identify cotyledon in the given figure of seed
A) I
B) II
C) III
D) IV
Identify scutellum in the given figure –
A) I
B) II
C) III
D) IV
The given figure shows –
A) Eucarp of apple and lithi
B) Pseudocarp of apple litchi
C) Eucarp of apple and strawberry
D) Pseudocarp of apple and strawberry
In angiosperm, pollination and fertilization are –
A) Both independent of water
B) Both dependent of water
C) Only pollination is essentially on water
D) Only fertilization is dependent on water
For storage of seeds –
A) Dehydration is important
B) Dormancy is important
C) Neither dehydration nor dormancy is needed
D) Both dehydration and dormancy are crucial
The oldest yet viable seed found is –
A) Lupinus from arctic tundra
B) Phoenix from arctic tundra
C) Lupinus from king herod’s palace
D) Phoenix from king herod’s palace
Phoenix dactylifera is commonly known as–
A) Fig
B) Coconut
C) Cashew
D) None of these
Apomixis is –
A) Fruit without fertilization
B) Seed without fertilization
C) Plant without fertilization
D) More than one option
Apomixis is –
A) A form of sexual reproduction that mimics asexual reproduction
B) A form of asexual reproduction that mimics sexual reproduction
C) Both of the above
D) None of these
Apomixis is found in –
A) Solanaceae
B) Liliaceae
C) Asteraceae
D) Brassicaceae
Mango contains –
A) Multiple ovaries in a flower
B) Multiple ovules in an ovary
C) Multiple embryo in an ovule
D) More than one option is correct
What is the major constraint associated with hybrides?
A) Hybrides are not accepted by farmers
B) Hybrides are costly
C) Hybrid seeds have to be produced every year and the seeds from hybrid cannot be sown
D) More than one option is correct
What is the problem with sowing seeds from hybrid plant?
A) Seeds will not germinate (low germination rate)
B) Progeny will be unhealthy
C) Hybrid characters will be lost due to segregation
D) All of these
Which of the following has proved helpful in preserving pollen as fossils?
(a) Pollenkitt
(b) Cellulosic intine
(c) Sporopollenin
(d) Oil content
Pollen grains can be stored for several years in liquid nitrogen having a temperature of :
(a) – 120°C
(b) – 80°C
(c) – 160°C
(d) – 196°C
Double fertilisation is:
(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) syngamy and triple fusion.
(d) fusion of two male gametes with one egg.
Attractants and rewards are required for
(a) Entomophily
(b) Hydrophily
(c) Cleistogamy
(d) Anemophily
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
(a) Bee
(b) Wind
(c) Bat
(d) Water
A dioecious flowering plant prevents both:
(a) Autogamy and geitonogamy
(b) Geitonogamy and xenogamy
(c) Cleistogamy and xenogamy
(d) Autogamy and xenogamy
Functional megaspore in an angiosperm develops into:
(a) Endosperm
(b) Embryo sac
(c) Embryo
(d) Ovule
Which one of the following statements is not true?
(a) Tapetum helps in the dehiscence of anther.
(b) Exine of pollen grains is made up of sporopollenin.
(c) Pollen grains of many species cause severe allergies.
(d) Stored pollen in liquid nitrogen can be used in the crop breeding programmes.
Which of the following statements is not correct?
(a) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the
same species grows into the style.
(b) Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.
(c) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting
with those of the pistil.
(d) Some reptiles have also been reported as pollinators in some plant species.
Filiform apparatus is characteristic feature of :
(a) Nucellar embryo
(b) Aleurone cell
(c) Synergids
(d) Generative cell
Which one of the following may require pollinators, but is genetically similar to autogamy?
(a) Xenogamy
(b) Apogamy
(c) Cleistogamy
(d) Geitonogamy
Which one of the following statements is not true?
(a) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.
(b) The flowers pollinated by flies and bats secrete foul odour to attract them.
(c) Honey is made by bees by digesting pollen collected from flowers.
(d) Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups.
The hilum is a scar on the
(a) fruit, where it was attached to pedicel.
(b) fruit, where style was present.
(c) seed, where micropyle was present.
(d) seed, where funicle was attached.
Which of the following are the important floral rewards to the animal pollinators?
(a) Nectar and pollen grains.
(b) Floral fragrance and calcium crystals.
(c) Protein pellicle and stigmatic exudates.
(d) Colour and large size flower.
Geitonogamy involves
(a) fertilisation of a flower by the pollen from another flower of the same plant.
(b) fertilisation of a flower by the pollen from the same flower.
(c) fertilisation of a flower by the pollen from a flower of another plant in the same population.
(d) fertilisation of a flower by the pollen from a flower of another plant belonging to a distant population.
Male gametophyte with least number of cell is present in
(a) Pteris
(b) Funaria
(c) Lilium
(d) Pinus
Function of filiform apparatus is to
(a) recognise the suitable pollen at stigma.
(b) stimulate division of generative cell.
(c) produce nectar.
(d) guide the entry of pollen tube.
Non-albuminous seed is produced in:
(a) Maize
(b) Castor
(c) Wheat
(d) Pea
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect ?
(1) Ovary develops into fruit
(2) Zygote develops into embryo
(3) Central cell develops into endosperm
(4) Ovules develop into embryo sac
Persistent nucellus in the seed is known as :
(1) Chalaza
(2) Perisperm
(3) Hilum
(4) Tegmen
What is the fate of the male gametes discharged in the synergid?
(1) One fuses with the egg, other(s) degenerate(s) in the synergid.
(2) All fuse with the egg.
(3) One fuses with the egg, other(s) fuse(s) with synergid nucleus.
(4) One fuses with the egg and other fuses with central cell nuclei.
Which is the most common type of embryo sac in angiosperms ?
(1) Tetrasporic with one mitotic stage of divisions
(2) Monosporic with three sequential mitotic divisions
(3) Monosporic with two sequential mitotic divisions
(4) Bisporic with two sequential mitotic divisions
What type of pollination takes place in Vallisneria?
(1) Pollination occurs in submerged condition by water
(2) Flowers emerge above surface of water, and pollination occurs by insects.
(3) Flowers emerge above water surface, and pollen is carried by wind.
(4) Male flowers are carried by water currents to female flowers at surface of water
In which one of the following, both autogamy and geitonogamy are prevented?
(1) Wheat
(2) Papaya
(3) Castor
(4) Maize
Which of the following is incorrect for wind-pollinated plants ?
(1) Well exposed stamens and stigma
(2) Many ovules in each ovary
(3) Flowers are small and not brightly coloured
(4) Pollen grains are light and non-sticky
The body of the ovule is fused within the funicle at
1) Chalaza
2) Hilum
3) Micropyle
4) Nucellus
In water hyacinth and water lily, pollination takes place by
1) Insects and water
2) Insects or wind
3) Water currents only
4) Wind and water
The plant parts which consist two generations -one within the other.
a) Pollen grains inside the anther b) Germinated pollen grain with two male gametes
c) Seed inside the fruit d) Embryo sac inside the ovule
1) a and d
2) a only
3) a, b, and c
4) c and d
A typical angiosperm embryo sac at maturity is
1) 7- nucleate and 8 – celled
2) 7- nucleate and 7- celled
3) 8 –nucleate and 8- celled
4) 8- nucleate and 7- celled
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
1) Geitonogamy
2) Chasmogamy
3) Cleistogamy
4) Xenogamy
In some members of which of the following pairs of families, pollen grains retain their visibility for months after release?
1) Poaceae ; Leguminosae
2) Poaceae ; Solanaceae
3) Rosaceae ; Leguminosae
4) Poaceae ; Rosaceae
Identify the incorrect statement related to pollination:
1) Pollination by water is quite rare in flowering plants
2) Pollination by wind is more common amongst abiotic pollination
3) Flowers produce foul odours to attract flies and beetles to get pollinated
4) Moths and butterflies are the most dominant pollinating agents among insects
Given below are two statements:
Statement I: Cleistogamous flowers are invariably autogamous
Statement II: Cleistogamy is disadvantageous as there is no chance for cross pollination
In the light of the above statements, choose the correct answer from the options given Below.
1) Bothe Statement I and Statement II are correct
2) Bothe Statement I and Statement II are incorrect
3) Statement I is correct but Statement II is incorrect
4) Statement I is incorrect but Statement II is correct
Which part of the fruit, labelled in the given figure makes it a false fruit?
1) A Mesocarp
2) B Endocarp
3) C Thalamus
4) D Seed