Biology MCQs for Class 12 Chapter wise with Answers Download Free PDF: MCQs of biology class 12 Chapter 2 Sexual Reproduction in Flowering Plants is very important for the students who want to get good marks in their CBSE RBSE NCERT Board Exams. Neet MCQ
MCQs of Biology Class 12 Chapter 2 Sexual Reproduction in Flowering Plants with answers PDF Download
Question 1.
What is the function of filiform apparatus in an angiospermic embryo sac?
(a) Brings about opening of the pollen tube
(b) Guides the pollen tube into a synergid
(c) Prevents entry of more than one pollen tube into a synergid
(d) None of these
Answer:
(b) Guides the pollen tube into a synergid
Question 2.
The female gametophyte of a typical dicot at the time of fertilisation is
(a) 8 – celled
(b) 7 – celled
(c) 6 – celled
(d) 5 – celled
Answer:
(b) 7 – celled
Question 3.
Polygonum type of embryo sac is
(a) 8 – nucleate, 7 – celled
(b) 8 – nucleate, 8 – celled
(c) 7 – nucleate, 7 – celled
(d) 4 – nucleate, 3 – celled
Answer:
(a) 8 – nucleate, 7 – celled
Question 4.
Both chasmogamous and cleistogamous flowers are present in
(a) Helianthus
(b) Commelina
(c) Rosa
(d) Gossypium
Answer:
(b) Commelina
Question 5.
Even in absence of pollinating agents seed-setting is assured in
(a) Commelina
(b) Zostera
(c) Salvia
(d) Fig
Answer:
(a) Commelina
Question 6.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in
(a) papaya
(b) bottle gourd
(c) maize
(d) all of these.
Answer:
(a) papaya
Question 7.
Feathery stigma occurs in
(a) pea
(b) wheat
(c) Datura
(d) Caesalpinia
Answer:
(b) wheat
Question 8.
Plants with ovaries having only one or a few ovules are generally pollinated by
(a) bees
(b) butterflies
(c) birds
(d) wind
Answer:
(d) wind
Question 9.
Which of the following is not a water pollinated plant ?
(a) Zostera
(b) Vallisneria
(c) Hydrilla
(d) Cannabis
Answer:
(d) Cannabis
Question 10.
Spiny or sticky pollen grains and large, attractively coloured flowers are associated with
(a) hydrophily
(b) entomophily
(c) ornithophily
(d) anemophily
Answer:
(b) entomophily
Question 11.
Endospermic seeds are found in
(a) castor
(b) barley
(c) coconut
(d) all of these
Answer:
(d) all of these
Question 12.
In albuminous seeds, food is stored in _______ and in non albuminous seeds, it is stored in _______.
(a) endosperm, cotyledons
(b) cotyledons, endosperm
(c) nucellus, cotyledons
(d) endosperm, radicle
Answer:
(a) endosperm, cotyledons
Question 13.
Persistent nucellus is called as _______ and is found in _______.
(a) perisperm, black pepper
(b) perisperm, groundnut ‘
(c) endosperm, black pepper
(d) endosperm groundnut
Answer:
(a) perisperm, black pepper
Question 14.
Indentify the wrong statement regarding post-fertilisation development.
(a) The ovary wall develops into pericarp.
(b) The outer integument of ovule develops into tegmen.
(c) The fusion nucleus (triple nucleus) develops into endosperm.
(d) The ovule develops into seed.
Answer:
(b) The outer integument of ovule develops into tegmen.
Question 15.
Polyembryony commonly occurs in
(a) banana
(b) tomato
(c) potato
(d) citrus.
Answer:
(d) citrus.
Question 16.
An embryo may sometimes develop from any cell of embryo sac other than egg. It is termed as
(a) apospory
(b) apogamy
(c) parthenogenesis
(d) parthenocarpy
Answer:
(b) apogamy
Question 17.
Embryo sac is to ovule as _______ is to an anther.
(a) Stamen
(b) filament
(c) pollen grain
(d) androecium
Answer:
(c) pollen grain
Question 18.
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.
Answer:
(d) epidermis and tapetum.
Question 19.
During microsporogenesis, meiosis occurs in
(a) endothecium
(b) microspore mother cells
(c) microspore tetrads
(d) pollen grains
Answer:
(b) microspore mother cells
Question 20.
From among the sets of terms 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
Answer:
(a) Stigma, ovule, embryo sac, placenta
Question 21.
Science of cultivation, breeding, marketing and arrangement of flowers is called
(a) arboriculture
(b) floriculture
(c) horticulture
(d) anthology
Answer:
(b) floriculture
Question 22.
Nonessential floral organs in a flower are
(a) sepals and petals
(b) anther and ovary
(c) stigma and filament
(d) petals only.
Answer:
(a) sepals and petals
Question 23.
The stamens represent
(a) microsporangia
(b) male gametophyte
(c) male gametes
(d) microsporophylls.
Answer:
(d) microsporophylls
Question 24.
Anther is generally
(a) monosporangiate
(b) bisporangiate
(c) letrasporangiate
(d) trisporangiate.
Answer:
(c) letrasporangiate
Question 25.
The anther wall consists of four wall layers where
(a) tapetum lies just inner to endothecium
(b) middle layers lie between endothecium and tapetum
(c) endothecium lies inner to middle layers
(d) tapetum lies next to epidermis.
Answer:
(b) middle layers lie between endothecium and tapetum
Question 26.
The innermost layer of anther is tapetum whose function is
(a) dehiscence
(b) mechanical
(c) nutrition
(d) protection.
Answer:
(c) nutrition
Question 27.
Callase enzyme which dissolves callose of pollen tetrads to separate four pollens is provided by
(a) pollens
(b) tapetum
(c) middle layers
(d) endothecium.
Answer:
(b) tapetum
Question 28.
In angiosperms various stages of reductional division can best be studied in
(a) young anthers
(b) mature anthers
(c) young ovules
(d) endosperm cells.
Answer:
(a) young anthers
Question 29.
Study of pollen grains is called
(a) micrology
(b) anthology
(c) palynology
(d) pomology
Answer:
(c) palynology
Question 30.
Several pollen grains form a unit designated as pollinium in Family
(a) Asteraceae
(c) Asclepiadaceae Pollen
(b) Cucurbitaceae
(d) Brassicaceae
Answer:
(c) Asclepiadaceae Pollen
Question 31.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with
(a) egg
(b) synergid
(c) secondary nucleus
(d) antipodal.
Answer:
(c) secondary nucleus
Question 32.
Double fertilisation was first discovered in 1898 by _______ in Fritillaria and Lilium.
(a) Nawaschin
(b) Strasburger
(c) Amici
(d) Focke
Answer:
(a) Nawaschin
Question 33.
If an endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in each cell of the root will be
(a) 8
(b) 4
(c) 16
(d) 24
Answer:
(c) 16
Question 34.
The cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes ?
(a) 8
(b) 16
(c) 23
(d) 32
Answer:
(a) 8
Question 35.
The true embryo develops as a result to fusion of
(a) two polar nuclei of embryo sac
(b) egg cell and male gamete
(c) synergid and male gamete
(d) male gamete and antipodals.
Answer:
(b) egg cell and male gamete
Question 36.
Father of Indian embryology is
(a) P. Maheshwari
(b) Swaminathan
(c) R. Misra
(d) Butler
Answer:
(a) P. Maheshwari
Question 37.
The portion of embryonal axis between plumule (future shoot) and cotyledons is called
(a) hypocotyl
(b) epicotyl
(c) coleorhiza
(d) coleoptile.
Answer:
(b) epicotyl
Question 38.
Coleoptile and coleorhiza are the protective sheaths _______ covering _______ and _______ respectively.
(a) plumule, epicotyl
(b) radicle, plumule
(c) plumule, radicle
(d) radicle, hypocotyl
Answer:
(c) plumule, radicle
Question 39.
_______ is not an endospermic seed.
(a) Pea
(b) Castor
(c) Maize
(d) Wheat
Answer:
(a) Pea
Question 40.
Endosperm is completely consumed by the developing embryo in
(a) pea and groundnut
(b) maize and castor
(c) castor and groundnut
(d) maize and pea.
Answer:
(a) pea and groundnut
Question 41.
Pollen grain is a
(a) megaspore
(b) microspore
(b) microspore
(d) microsporangium.
Answer:
(b) microspore
Question 42.
How many pollen mother cells should undergo meiotic division to produce 64 pollen grains ?
(a) 64
(b) 32
(c) 16
(d) 8
Answer:
(c) 16
Question 43.
How many meiotic divisions are required for the formation of 100 pollen grains ?
(a) 100
(b) 50
(c) 25
(d) 26
Answer:
(c) 25
Question 44.
One of the most resistant biological material present in the exine of pollen grain is
(a) pectocellulose
(b) sporopollenin
(c) suberin
(d) cellulose.
Answer:
(b) sporopollenin
Question 45.
What is the function of germ pore ?
(a) Emergence of radicle
(b) Absorption of water for seed germination
(c) Initiation of pollen tube
(d) All of these .
Answer:
(c) Initiation of pollen tube
Question 46.
_______of the pollen grain divides to form two male gametes.
(a) Vegetative cell
(b) Generative cell
(c) Microspore mother cell
(d) None of these
Answer:
(b) Generative cell
Question 47.
The three cells found in a pollen grain when it is shed at 3-celled stage are
(a) 1 vegetative cell, 1 generative cell, 1 male gamete
(b) 1 vegetative cell, 2 male gametes
(c) 1 generative cell, 2 male gametes
(d) either (a) or (b).
Answer:
(b) 1 vegetative cell, 2 male gametes
Question 48.
Megasporangium along with its protective integuments is called
(a) ovary
(b) ovule
(c) funicle
(d) chalaza
Answer:
(b) ovule
Question 49.
Mature ovules are classified on the basis of funiculus. If micropyle comes to lie close to the funiculus the ovule is termed as
(a) orthotropous
(b) anatropous
(c) hemitropous
(d) campylotropous
Answer:
(b) anatropous
Question 50.
When micropyle, chalaza and hilum lie in a straight line, the ovule is said to be
(a) anatropous
(b) orthotropous
(c) amphitropous
(d) campylotropous.
Answer:
(b) orthotropous
Question 51.
Fragrant flowers with well developed nectaries are an adaptation for
(a) hydrophily
(b) anemophily
(c) entomophily
(d) none of these
Answer:
(c) entomophily
Question 52.
Pollen kitt is generally found in
(a) anemophilous flowers
(b) entomophilous flowers
(c) ornithophilous flowers
(d) malacophilous flowers
Answer:
(b) entomophilous flowers
Question 53.
Which of these is a condition that makes flowers invariably autogamous ?
(a) Dioecy
(b) Self incompatibility
(c) Cleistogamy
(d) Xenogamy
Answer:
(c) Cleistogamy
Question 54.
Heterostyly as a contrivance for cross-pollination is found in
(a) Pennisetum
(b) Impatiens
(c) Primula vulgaris
(d) Oenothera
Answer:
(c) Primula vulgaris
Question 55.
The part of gynoecium that determines the compatible nature of pollen is
(a) stigma
(b) style
(c) ovary
(d) synergids
Answer:
(a) stigma
Question 56.
Part of the gynoecium which receives the pollen is called
(a) style
(b) stigma
(c) ovule
(d) ovary
Answer:
(b) stigma
Question 57.
Growth of pollen tube towards embryo sac is
(a) chemotropic
(b) thigmotaxis
(c) geotropic
(d) none of these
Answer:
(a) chemotropic
Question 58.
During the process of fertilisation the pollen tube of the pollen grain usually enters the embryo sac through
(a) integument
(b) nucellus
(c) chalaza
(d) micropyle
Answer:
(d) micropyle
Question 59.
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)
Answer:
(d) both (a) and (b)
Question 60.
The total number of nuclei involved in double fertilisation in angiospersm are
(a) two
(b) three
(c) four
(d) five
Answer:
(d) five
More 12 MCQs Question for class 12 Biology Chapter 2
Question 1.
In a type of apomixis known as adventive 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
Answer: (a) Nucellus or integuments
Question 2.
In some plants anthers and stigma grow and mature at same time. This phenomenon is called
(a) Homogamy
(b) Syngamy
(c) Allogamy
(d) Fusion
Answer: (a) Homogamy
Question 3.
In which one pair both the plants can be vegetatively propagated by leaf segments?
(a) Agave and Kalanchoe
(b) Bryophyllum and Kalanchoe
(c) Asparagus and Bryophyllum
(d) Chrysanthemum and Agave
Answer: (b) Bryophyllum and Kalanchoe
Question 4.
Through which cell of the embryo sac, does the pollen . tube enter the embryo sac?
(a) Egg cell
(b) Persistant synergid
(c) Degenerated synergid
(d) Central cell
Answer: (c) Degenerated synergid
Question 5.
Anthersis is a phenomenon which refers to
(a) Formation of pollen
(b) Development of anther
(c) Opening of flower bud
(d) Reception of pollen by stigma
Answer: (c) Opening of flower bud
Question 6.
The pollen tube usually enters the embryosac
(a) Through one of the synergids
(b) By directly penetrating the egg
(c) Between one synergid and central cell
(d) By Jtnocking off the antipodal cells
Answer: (a) Through one of the synergids
Question 7.
Milky water of tender coconut is
(a) Liquid gametes
(b) Liquid nucellus
(c) Liquid female gametophyte
(d) Liquid endosperm
Answer: (d) Liquid endosperm
Question 8.
The aleurone layer in maize grain is specially rich in :
(a) Starch
(b) Lipids
(c) Auxims
(d) Proteins
Answer: (d) Proteins
Question 9.
Pollen grains are able to withstand extremes of temperature and dissication because their exine is composed of
(a) Cutin
(b) Suberin
(c) Sporopollenin
(d) Callose
Answer: (c) Sporopollenin
Question 10.
Fertilization is depicted by the condition
(a) N → 2N
(b) 2N → N
(c) 2N → 4N
(d) 4N → 2N
Answer: (a) N → 2N
Question 11.
What is the direction of micropyle in anatropous ovule?
(a) Upward
(b) Downward
(c) Right
(d) Left
Answer: (b) Downward
Question 12.
Vegetative propagation by bulbils occur in
(a) Agave
(b) Gingiber
(c) Vallisneria
(d) Curcuma
Answer: (a) Agave
Question 13.
The arrangement of megaspores in a tetrad in an Angiosperm is
(a) Decussate
(b) Tetrahedral
(c) Linear
(d) Isobilateral
Answer: (c) Linear
Question 14.
In angiosperms all the four microspores of tetrad are covered by a layer which is formed by
(a) Pectocellulose
(b) Callose
(c) Cellullose
(d) Sporopollenin
Answer: (b) Callose
Question 15.
The sexual reproduction in plants was first reported by
(a) Nawaschin
(b) Camererius
(c) Hanstein
(d) Amici
Answer: (b) Camererius
Fill in the Blanks
Question 1.
Bryophyllum is the best example of propagation by ………………
Answer: eaf
Question 2.
Fertilization in angiosperms is referred to as ……………… fertilization.
Answer: double
Question 3.
Inside ovary, ovules develop, form a special tissue called ………………
Answer: placenta
Question 4.
Aliuminous seeds store reserve food material in ………………
Answer: endosperm
Question 5.
Each microspore mother cell has ……………… of chromosomes and therefore is ………………
Answer: 2n, diploid
Question 6.
The ……………… direct the growth of pollen tube towards egg apparatus by secreting some chemical substances.
Answer: synergids
Question 7.
Stem cuttings are frequently used for ………………
Answer: vegetative propagation
Question 8.
Mustard and tomato are examples of ……………… flower.
Answer: hypogynous
Question 9.
Spike with unisexual flowers is called ………………
Answer: catkin
Question 10.
In Calotropis, all the microspores of anther lobe remain united to form ………………
Answer: pollenium.
Write True or False
Question 1.
Only meiotic divisions are involved in. asexual reproduction.
Answer: False
Question 2.
Coriander has compound Unibel type inflorescence.
Answer: True
Question 3.
Cross-pollination requires abiotic or biotic agent.
Answer: True
Question 4.
Coleoptile is the sheath covering of plumule.
Answer: True
Question 5.
Within each ovule a haploid embryo sac usually containing 7 nuclei is formed.
Answer: False
Question 6.
A population of genetically identical plants derived from an individual is called a seed.
Answer: False
Question 7.
In Vallisneria the male flowers are released in air.
Answer: False
Question 8.
Synga my means fusion of gametes.
Answer: True
Question 9.
In plants, meiosis occurs in pollen grain.
Answer: False
Question 10.
A clone is a group of individual obtained through vegetative propagation.
Answer: True
One Word Answers
Question 1.
Name the outer covering of seed.
Answer: Testa
Question 2.
The female gametophyte of flowering plants that contains an egg cell.
Answer: Embryosac
Question 3.
Give one example of non-endospermic dicot seed.
Answer: Pea
Question 4.
The nutritive layer of anther wall which provides nourishment to the developing microspores.
Answer: Tapetum
Question 5.
Dispersal of fruits and seeds through water is termed as.
Answer: Hydrochory
Question 6.
Name the sheath covering of plumule.
Answer: Coleoptile
Question 7.
What is pomalogy?
Answer: Study of fruits and their cultivation
Question 8.
Name the process of the formation of microspores from microspore mother ceils.
Answer: Microsporcgenesis
Question 9.
Name a cultivated plant in which neither fruits nor seeds are formed.
Answer: Sugarcane
Question 10.
The areas on the surface of the pollen where exine is very thin or absent.
Answer: Aperture
Match the Following
| Column I | Column II |
| A. Parthenocarpy | 1. Tepal |
| B. Tissue culture | 2. Edible banana |
| C. Perianth | 3. Scion |
| D. Grafting | 4. Ground nut |
| E. Non-endospermous seed | 5. Callus |
Answer:
| Column I | Column II |
| A. Parthenocarpy | 2. Edible banana |
| B. Tissue culture | 5. Callus |
| C. Perianth | 1. Tepal |
| D. Grafting | 3. Scion |
| E. Non-endospermous seed | 4. Ground nut |
