Refer to CBSE Class 12 Biology Sexual Reproduction in Flowering Plants MCQs provided below. CBSE Class 12 Biology MCQs with answers available in Pdf for free download. The MCQ Questions for Class 12 Biology with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 12 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 2 Sexual Reproduction in Flowering Plants are an important part of exams for Class 12 Biology and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 12 Biology and also download more latest study material for all subjects
MCQ for Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Plants
Class 12 Biology students should refer to the following multiple-choice questions with answers for Chapter 2 Sexual Reproduction in Flowering Plants in Class 12. These MCQ questions with answers for Class 12 Biology will come in exams and help you to score good marks
Chapter 2 Sexual Reproduction in Flowering Plants MCQ Questions Class 12 Biology with Answers
Question : Ovules are attached to a parenchymatous cushion called
a) nucellus
b) obturator
c) conducting tissue
d) placenta
Answer : D
Question : The point at which funiculus touches the ovule is
a) chalaza
b) hilum
c) raphe
d) endothelium
Answer : B
Question : Egg apparatus consists of
a) egg cell and antipodal cells.
b) egg cell and central cell.
c) egg cell and two synergids.
d) egg cell and one synergid.
Answer : C
Question : The most common type of ovule is __________ .
a) orthotropous
b) hemitropous
c) anatropous
d) campylotropous
Answer : C
Question : Filiform apparatus is found in
a) synergids
b) anther wall
c) secondary nucleus
d) egg cell
Answer : A
Question : Polygonum type of embryo sac/typical female gametophyte of angiosperms is
a) 7-celled, 7-nucleate
b) 7-celled, 8-nucleate
c) 8-celled, 7-nucleate
d) 8-celled, 8-nucleate
Answer : B
Question : Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
a) geitonogamy
b) xenogamy
c) autogamy
d) cleistogamy
Answer : A
Question : Cleistogamous flowers are
a) wind pollinated
b) self-pollinated
c) cross-pollinated
d) insect pollinated
Answer : B
Question : Both chasmogamous and cleistogamous flowers are present in
a) Helianthus
b) Lommelina
c) Rosa
d) Gossypium
Answer : B
Question : Pollination by water occurs in
a) Vallisneria
b) Zostera
c) Satvia
d) All of these
Answer : A
Question : Cleistogamous flowers are
a) Cleistogamous flowers are
b) Cross pollinated
c) Insect pollinated
d) Insect pollinated
Answer : A
Question : Embryo sac is also known as
a) Megagametophyte
b) Microgametophyte
c) Microsporangium
d) Megasporangium
Answer : A
Question : In a fertilised embryo sac, the haploid, diploid and triploid structures are
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.
Answer : A
Question : Route used by pollen tube for entering ovule is
a) Any of the above
b) Chalaza
c) Micropyle
d) Integument
Answer : A
Question : Embryo sac is called monosporic when it develops from
a) One of the megaspores out of the four megaspores which are derived from division of megaspore mother cell
b) Three megaspores
c) Only from two functional megaspores
d) None of these
Answer : A
Question : Number of prothallial cells present in male gametophyte of flowering plant is
a) Zero
b) One
c) Two
d) Four
Answer : A
Question : Embryo sac is found in
a) Ovule
b) Seed
c) Embryo
d) Endosperm
Answer : A
Question : Gloriosa superba exhibits
a) Herkogamy
b) Cleistogamy
c) Self sterility
d) Heterostyly
Answer : A
Question : In an embryo sac, the cells that degenerate after fertilisation are
a) Synergids and antipodals
b) Antipodals and primary endosperm cell
c) Egg and antipodals.
d) Synergids and primary endosperm cell
Answer : A
Question : Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
a) Wind
b) Bat
c) Bee
d) Water
Answer : A
Question : While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant
a) Emasculation
b) Collection of pollen
c) Dusting of pollen on stigma
d) Bagging of female flower
Answer : A
Question : Functional megaspore in an angiosperm develops into
a) Embryo sac
b) Embryo
c) Endosperm
d) Ovule
Answer : A
Question : A dioecious flowering plant prevents both
a) Autogamy and geitonogamy
b) Autogamy and xenogamy
c) Geitonogamy and xenogamy
d) Cleistogamy and xenogamy
Answer : A
a) megasporangium
b) megasporophyll
c) megaspore
d) None of these
Answer : A
a) Apomixis
b) Somatic hybridization
c) Budding
d) Sporulation
Answer : A
a) Thalamus or petal
b) Placenta
c) Connective
d) None of these
Answer : A
b) triploid
d) pentaploid
Answer : A
Answer : D
Answer : D
b) mesogamy
d) pseudogamy
Answer : C
Answer : C
Answer : D
Answer : C
Answer : D
Answer : C
b) embryo sac
d) pollen grain
Answer : D
Answer : B
Answer : D
b) axis part of embryo
d) endosperm
Answer : C
b) embryology
d) cytology
Answer : B
b) 400/800
d) 250/500
Answer : D
Answer : B
b) anatropous
d) amphitropous
Answer : A
b) pteridophytes
d) bryophytes
Answer : A
b) bees
d) beetles
Answer : B
b) root tip
d) buds
Answer : C
b) allogamy
d) geitonogamy
Answer : D
b) hemicellulose
d) sporopollenin
Answer : D
b) siphonogamy
d) syngonogamy
Answer : B
b) 50
d) 100
Answer : A
b) turmeric
d) potato
Answer : A
b) endosperm
d) fruit wall
Answer : B
b) 20
d) 80
Answer : C
b) triploid
d) pentaploid
Answer : D
b) haploid
d) polyploid
Answer : B
Answer : B
Answer : B
Answer : D
Answer : B
b) integuments
d) fertilized egg
Answer : A
b) bottle brush
d) coconut
Answer : D
b) callose
d) sporopollenin
Answer : B
b) Downward
d) Left
Answer : B
b) antipodal cell
d) synergid
Answer : D
Answer : C
b) campylotropous
d) orthotropous
Answer : A
b) Atropous
d) Amphitropous
Answer : D
b) Circinotropous
d) Anatropous
Answer : A
Answer : C
Answer : A
Answer : A
Question : Pine apple fruit develops from
Answer : C
Answer : B
b) 2 + 3 + 3
d) 2 + 4 + 2
Answer : A
b) 32
d) 16
Answer : A
Question : Flowers are highly modified _______.
a) Root
b) Shoot
c) Stem
d) Leaves
Answer : B
Question : A typical flower has ______different kinds of whorl.
a) two
b) three
c) four
d) five
Answer : C
Question : Anther is typically
a) tetrasporangiate
b) bisporangiate
c) trisporangiate
d) monosporangiate
Answer : A
Question : The functions of tapetum is to
a) produce ubisch bodies.
b) produce pollen grains.
c) provide nourishment to the developing pollen grains.
d) store and protect pollen grains.
Answer : C
Question : Microsporogenesis occurs
a) on margins of leaves.
b) inside the ovule.
c) inside the anther.
d) in essential floral organs.
Answer : C
Question : Exine of pollen grain is formed of
a) callose
b) pecto-cellulose
c) ligno-cellulose
d) sporopollenin
Answer : D
Question : One of the most resistant known biological material is.
a) lignin
b) hemicellulose
c) sporopollenin
d) lignocellulose
Answer : C
Question : Pollen grain is liberated at
a) one celled stage.
b) two celled stage.
c) three celled stage.
d) two or three celled stage.
Answer : D
Question : Pollen grains can be stored in liquid nitrogen at
a) 70°C
b) 100°C
c) – 196°C
d) 0°C
Answer : C
Question : Ovule is
a) megasporangium
b) megasporophyll
c) integumented megasporangium
d) rolled megasporophyll
Answer : A
Question : Among the terms listed below, those that of are not technically correct names for a floral whorl are:
i. Androecium
ii. Carpel
iii. Corolla
iv. Sepal
a) ii and iv
b) i and ii
c) iii and iv
d) i and iv
Answer : A
Question : How many microspore mother cells are required to produce 1000 microspores/pollen grains?
a) 250
b) 200
c) 150
d) 100
Answer : A
Question : Embryo sac is to ovule as _______ is to an anther
a) Pollen grain
b) Androecium
c) Filament
d) Stamen
Answer : A
Question : Which of the following represents the female gametophyte in angiosperms?
a) Embryo sac
b) Synergid
c) Endosperm
d) Embryo
Answer : A
Question : In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is:
a) Calyx, corolla, androecium and gynoecium
b) Calyx, corolla, gynoecium and androecium
c) Gynoecium, androecium, corolla and calyx
d) Androecium, gynoecium, corolla and calyx
Answer : A
Question : In a breeding experiment, the selected male parent is diploid and the female parent is tetraploid. What will be the ploidy level of the endosperm that will develop after double fertilisation?
a) Pentaploid
b) Tetraploid
c) Triploid
d) Diploid
Answer : A
Question : A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is:
a) Plant is dioecious and bears only staminate flowers
b) Plant is monoecious
c) Plant is dioecious and bears both pistillate and staminate flowers
d) Plant is dioecious and bears only pistillate flowers
Answer : A
Question : The development of fruits without fertilisation of the ovary, is called
a) parthenocarpy
b) parthenogenesis
c) agamospermy
d) None of these
Answer : A
Question : The outermost and innermost wall layers of microsporangium in an anther are respectively
a) Epidermis and tapetum
b) Epidermis and middle layer
c) Epidermis and endodermis
d) Endothecium and tapetum
Answer : A
Question : When the pollen of a flower is transferred to the stigma of another flower on the same plant, the process is known as
a) geitonogamy
b) autogamy
c) Both
d) None of these
Answer : A
Question : The number of meiotic divisions, required to produce 400 seeds in a pea plant, is
a) 500
b) 400
c) 300
d) 200
Answer : A
Question : 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
Question : During microsporogenesis, meiosis occurs in
a) Microspore mother cells
b) Microspore tetrads
c) Pollen grains
d) Endothecium
Answer : A
Question : A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is
a) plant is dioecious and bears only staminate flowers
b) plant is monoecious
c) plant is dioecious and bears both pistillate and staminate flowers
d) None of these
Answer : A
Question : Starting from the innermost part, the correct sequence of parts in an ovule are
a) egg, embryo sac, nucellus, integument
b) embryo sac, nucellus, integument, egg
c) egg, integument, embryo sac, nucellus
d) egg, nucellus, embryo sac, integument
Answer : A
Question : Autogamy can occur in a chasmogamous flower if
a) both pollen and ovules mature simultaneously
b) both anther and stigma are of equal lengths
c) ovules mature before maturity of pollen
d) None of these
Answer : A
Question : 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
a) i & ii
b) ii & iv
c) i and iv
d) None of these
Answer : A
Question : Apomixis is a type of reproduction that results is the development of a/an
a) New organism without fusion of gametes
b) New organism from fusion products of gametes
c) Embryo from endosperm
d) None of these
Answer : A
Question : Choose the correct statement from the following.
a) Cleistogamous flowers always exhibit autogamy
b) Cleistogamous flowers always exhibit autogamy
c) Cleistogamous flowers exhibit both autogamy and geitonogamy
d) All of these
Answer : A
Question : Wind pollination is common in
a) Grasses
b) Lilies
c) All of these
d) Legumes
Answer : A
Question : From among the situations given below, choose the one that prevents both autogamy and geitonogamy
a) Dioecious plant bearing only male or female flowers.
b) Monoecious plant with bisexual flowers
c) Dioecious plant with bisexual flowers
d) None of these
Answer : A
Question : Autogamy can occur in a chasmogamous flower if:
a) Both pollen and ovules mature simultaneously
b) Both anther and stigma are of equal lengths
c) Ovules mature before maturity of pollen
d) Pollen matures before maturity of ovule
Answer : A
Question : Choose the correct statement from the following
a) Cleistogamous flowers always exhibit autogamy
b) Chasmogamous flowers always exhibit geitonogamy
c) Cleistogamous flowers exhibit both autogamy and geitonogamy
d) Chasmogamous flowers never exhibit autogamy
Answer : A
Question : In a fertilised embryo sac, the haploid, diploid and triploid structures are
a) Synergid, zygote and primary endosperm nucleus
b) Synergid, antipodal and polar nuclei
c) Both
d) None of these
Answer : A
Question : In an embryo sac, the cells that degenerate after fertilisation are
a) Synergids and antipodals
b) Synergids and antipodals
c) Antipodals and primary endosperm cell
d) None of these
Answer : A
Question : Which of the following floral parts forms the pericarp after fertilisation?
a) Ovary wall
b) Inner integument
c) Outer integument
d) All of these
Answer : A
Question : Double fertilization was first discovered by Nawaschin (1898) in
a) Lilium and Fritillaria
b) Mango and Sugarcane
c) Papaya and Pea
d) Papaya and Pea
Answer : A
Question : Egg apparatus consists of
a) Egg and synergids
b) Egg and synergids
c) Egg and polar nuclei
d) All of these
Answer : A
Question : 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) Wind
b) Animals.
c) Water
d) Insects
Answer : A
Question : What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
a) 63
b) 84
c) 81
d) 75
Answer : A
Question : In ginger vegetative propagation occurs through
a) Rhizome
b) Offsets
c) Bulbils
d) None of these
Answer : A
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