Sexual Reproduction in Flowering Plants MCQs with Answers

Question-1. A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be

1. pentaploid
2. tetraploid
3. triploid
4. diploid

Question-2. Generative cell was destroyed by laser but a normal pollen tube was still formed because

1. the region of emergence of pollen tube is not harmed
2. vegetative cell is not damaged
3. contents of killed generative cell stimulate pollen growth
4. laser beam stimulates growth of pollen tube

Question-3. Pine apple fruit develops from

1. a multilocular monocarpellary flower
2. a unilocular polycarpellary flower
3. a multipistillate syncarpous flower
4. a cluster of compactly borne flowers on a common axis

Question-4. Polygonum type of embryo sac/typical female gametophyte of angiosperms is

1. 8-celled, 8-nucleate
2. 7-celled, 7-nucleate
3. 7-celled, 8-nucleate
4. 8-celled, 7-nucleate

Question-5. Which of the following pair has haploid structures?

1. Nucellus and primary endosperm nucleus
2. Nucellus and antipodal cells
3. Antipodal cells and egg cell
4. Antipodal cells and megaspore mother cell

Question-6. A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is

1. None of these
2. plant is dioecious and bears only staminate flowers
3. plant is monoecious
4. plant is dioecious and bears both pistillate and staminate flowers

Question-7. A dioecious flowering plant prevents both

1. Cleistogamy and xenogamy
2. Autogamy and geitonogamy
3. Autogamy and xenogamy
4. Geitonogamy and xenogamy

Question-8. 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:

1. Insects
2. Wind
3. Animals.
4. Water

Question-9. Adventive embryony in Citrus is due to

1. fertilized egg
2. nucellus
3. integuments
4. zygotic embryo

Question-10. Among the terms listed below, those that of are not technically correct names for a floral whorl are:i. Androeciumii. Carpeliii. Corollaiv. Sepal

1. i and iv
2. ii and iv
3. i and ii
4. iii and iv

Question-11. An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is

1. orthotropous
2. hemitropous
3. campylotropous
4. anatropous

Question-12. Anemophily type of pollination is found in

1. coconut
2. Salvia
3. bottle brush
4. Vallisneria

Question-13. Apomixis is a type of reproduction that results is the development of a/an

1. None of these
2. New organism without fusion of gametes
3. New organism from fusion products of gametes
4. Embryo from endosperm

Question-14. Autogamy can occur in a chasmogamous flower if:

1. Pollen matures before maturity of ovule
2. Both pollen and ovules mature simultaneously
3. Both anther and stigma are of equal lengths
4. Ovules mature before maturity of pollen

Question-15. Chief pollinators of agricultural crops are

1. beetles
2. butterflies
3. bees
4. moths

Question-16. Choose the correct statement from the following

1. Chasmogamous flowers never exhibit autogamy
2. Cleistogamous flowers always exhibit autogamy
3. Chasmogamous flowers always exhibit geitonogamy
4. Cleistogamous flowers exhibit both autogamy and geitonogamy

Question-17. Cleistogamous flowers are

1. insect pollinated
2. wind pollinated
3. self-pollinated
4. cross-pollinated

Question-18. Development of an organism from female gamete/egg without involving fertilization is

1. parthenogenesis
2. adventitive embryony
3. polyembryony
4. parthenocarpy

Question-19. Double fertilization and triple fusion were discovered by

1. Strasburger
2. Hofmeister
3. Nawaschin and Guignard
4. Leeuwenhoek

Question-20. Double fertilization is characteristic of

1. bryophytes
2. angiosperms
3. pteridophytes
4. gymnosperms

Question-21. Double fertilization is fusion of

1. one male gamete with egg and other with secondary nucleus
2. two eggs
3. two eggs and polar nuclei with pollen nuclei
4. one male gamete with egg and other with synergid

Question-22. Double fertilization leading to initiation of endosperm in angiosperms require

1. all of the above kinds of fusion in different angiosperms
2. fusion of one polar nucleus and the second male gamete only
3. fusion of two polar nuclei and the second male gamete
4. fusion of four or more polar nuclei and the second male gamete only

Question-23. Double fertilization was first discovered by Nawaschin (1898) in

1. Papaya and Pea
2. Lilium and Fritillaria
3. Mango and Sugarcane
4. Papaya and Pea

Question-24. During microsporogenesis, meiosis occurs in

1. Endothecium
2. Microspore mother cells
3. Microspore tetrads
4. Pollen grains

Question-25. Egg apparatus consists of

1. All of these
2. Egg and synergids
3. Egg and synergids
4. Egg and polar nuclei

Question-26. Eight nucleate embryo sacs are

1. sometimes monosporic, sometimes bisporic and sometimes tetrasporic
2. always tetrasporic
3. always monosporic
4. always bisporic

Question-27. Embryo sac is also known as

1. Megasporangium
2. Megagametophyte
3. Microgametophyte
4. Microsporangium

Question-28. Embryo sac is called monosporic when it develops from

1. None of these
2. One of the megaspores out of the four megaspores which are derived from division of megaspore mother cell
3. Three megaspores
4. Only from two functional megaspores

Question-29. Embryo sac is found in

1. Endosperm
2. Ovule
3. Seed
4. Embryo

Question-30. Embryo sac is to ovule as _______ is to an anther

1. Stamen
2. Pollen grain
3. Androecium
4. Filament

Question-31. Embryo sac occurs in

1. endosperm
2. embryo
3. axis part of embryo
4. ovule

Question-32. Entry of pollen tube through micropyle is

1. pseudogamy
2. chalazogamy
3. mesogamy
4. porogamy

Question-33. Female gametophyte of angiosperms is represented by

1. nucellus
2. ovule
3. megaspore mother cell
4. embryo sac

Question-34. Fertilization involving carrying of male gametes by pollen tube is

1. syngonogamy
2. porogamy
3. siphonogamy
4. chalazogamy

Question-35. Flowers showing ornithophily show few characteristic like

1. white flowers with fragrance
2. blue flower with nectaries at base of corolla
3. red sweet scented flower with nectaries
4. bright red flower into thick inflorescence

Question-36. Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by

1. Water
2. Wind
3. Bat
4. Bee

Question-37. From among the sets of terms given below, identify those that are associated with the gynoecium

1. Ovule, stamen, ovary, embryo sac
2. Stigma, ovule, embryo sac, placenta
3. Thalamus, pistil, style, ovule
4. Ovule, ovary, embryo sac, tapetum

Question-38. From among the situations given below, choose the one that prevents both autogamy and geitonogamy

1. None of these
2. Dioecious plant bearing only male or female flowers.
3. Monoecious plant with bisexual flowers
4. Dioecious plant with bisexual flowers

Question-39. Functional megaspore in an angiosperm develops into

1. Ovule
2. Embryo sac
3. Embryo
4. Endosperm

Question-40. Gloriosa superba exhibits

1. Heterostyly
2. Herkogamy
3. Cleistogamy
4. Self sterility

Question-41. Haploid plant cultures are got from

1. buds
2. leaves
3. root tip
4. pollen grain

Question-42. How many microspore mother cells are required to produce 1000 microspores/pollen grains?

1. 100
2. 250
3. 200
4. 150

Question-43. How many pollen grains will be formed after meiotic division in 10 microspore mother cells?

1. 80
2. 10
3. 20
4. 40

Question-44. If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be

1. pentaploid
2. haploid
3. triploid
4. tetraploid

Question-45. 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?

1. Diploid
2. Pentaploid
3. Tetraploid
4. Triploid

Question-46. In a fertilised embryo sac, the haploid, diploid and triploid structures are

1. Synergid, polar nuclei and zygote.
2. Synergid, zygote and primary endosperm nucleus
3. Synergid, antipodal and polar nuclei
4. Antipodal, synergid and primary endosperm nucleus

Question-47. In a flowering plant, archesporium gives rise to

1. wall and the tapetum
2. only tapetum and sporogenous cells
3. only the wall of the sporangium
4. both wall and the sporogenous cells

Question-48. In a type of apomixis known as adventive embryony, embryos develop directly from the

1. accessory embryo sac in the ovule
2. nucellus or integuments
3. zygote
4. synergids or antipodals in an embryo sac

Question-49. In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is:

1. Androecium, gynoecium, corolla and calyx
2. Calyx, corolla, androecium and gynoecium
3. Calyx, corolla, gynoecium and androecium
4. Gynoecium, androecium, corolla and calyx

Question-50. In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?

1. 100
2. 25
3. 50
4. 75

Question-51. In an embryo sac, the cells that degenerate after fertilisation are

1. None of these
2. Synergids and antipodals
3. Synergids and antipodals
4. Antipodals and primary endosperm cell

Question-52. In angiosperms all the four microspores of tetrad are covered by a layer which is formed by

1. sporopollenin
2. pectocellulose
3. callose
4. cellulose

Question-53. In angiosperms pollen tubes liberate their male gametes into the

1. synergid
2. central cell
3. antipodal cell
4. egg cell

Question-54. In angiosperms, triple fusion is required for the formation of

1. fruit wall
2. embryo
3. endosperm
4. seed coat

Question-55. In ginger vegetative propagation occurs through

1. None of these
2. Rhizome
3. Offsets
4. Bulbils

Question-56. In the young cob of maize, numerous filamentous hair like structures protruding from its tip are

1. hairy projections from the bracts
2. hair of seeds
3. long styles of carpels
4. anthers

Question-57. Male gametophyte of angiosperms/monocots is

1. stamen
2. microsporangium
3. nucellus
4. microspore

Question-58. Nucellus embryo is

1. apomictic diploid
2. amphimictic haploid
3. amphimictic diploid
4. apomictic haploid

Question-59. Number of meiotic divisions required to produce 200/400 seeds of pea would be

1. 250/500
2. 200/400
3. 400/800
4. 300/600

Question-60. Number of prothallial cells present in male gametophyte of flowering plant is

1. Four
2. Zero
3. One
4. Two

Question-61. One of the most resistant biological material is

1. sporopollenin
2. lignin
3. hemicellulose
4. lignocellulose

Question-62. Ovule is straight with funiculus, embryo sac, chalaza and micropyle lying on one straight line. It is

1. amphitropous
2. orthotropous
3. anatropous
4. campylotropous

Question-63. Point out the odd one

1. pollen grain
2. nucellus
3. embryo sac
4. micropyle

Question-64. Pollination occurs in

1. angiosperms and fungi
2. bryophytes and angiosperms
3. pteridophytes and angiosperms
4. angiosperms and gymnosperms

Question-65. Sperm and egg nuclei fuse due to

1. attraction of their protoplasts
2. base pairing of their DNA and RNA
3. formation of hydrogen bonds
4. mutual attraction due to differences in electrical charges

Question-66. Starting from the innermost part, the correct sequence of parts in an ovule are

1. egg, nucellus, embryo sac, integument
2. egg, embryo sac, nucellus, integument
3. embryo sac, nucellus, integument, egg
4. egg, integument, embryo sac, nucellus

Question-67. Study of formation, growth and development of new individual from an egg is

1. cytology
2. apomixis
3. embryology
4. embryogeny

Question-68. The arrangement of the nuclei in a normal embryo sac in the dicot plants is

1. 2 + 4 + 2
2. 3 +2 + 3
3. 2 + 3 + 3
4. 3 + 3 + 2

Question-69. The development of fruits without fertilisation of the ovary, is called

1. None of these
2. parthenocarpy
3. parthenogenesis
4. agamospermy

Question-70. The endosperm of gymnosperms is

1. polyploid
2. triploid
3. haploid
4. diploid

Question-71. The number of meiotic divisions, required to produce 400 seeds in a pea plant, is

1. 200
2. 500
3. 400
4. 300

Question-72. The outermost and innermost wall layers of microsporangium in an anther are respectively

1. Endothecium and tapetum
2. Epidermis and tapetum
3. Epidermis and middle layer
4. Epidermis and endodermis

Question-73. The polyembryony commonly occurs in

1. potato
2. Citrus
3. turmeric
4. tomato

Question-74. Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

1. Central cell
2. Egg cell
3. Persistant synergid
4. Degenerated synergid

Question-75. Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of

1. gamopetalous angiosperms
2. cycads
3. conifers
4. polypetalous angiosperms

Question-76. Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

1. cleistogamy
2. geitonogamy
3. xenogamy
4. autogamy

Question-77. Transfer of pollen to the stigma of another flower of the same plant is

1. geitonogamy
2. autogamy
3. allogamy
4. xenogamy

Question-78. What is the direction of micropyle in anatropous ovule?

1. Left
2. Upward
3. Downward
4. Right

Question-79. What would be the number of chromosomes in the cells of the aleuronelayer in a plant species with 8 chromosomes in its synergids?

1. 16
2. 24
3. 32
4. 8

Question-80. What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?

1. 75
2. 63
3. 84
4. 81

Question-81. When the pollen of a flower is transferred to the stigma of another flower on the same plant, the process is known as

1. None of these
2. geitonogamy
3. autogamy
4. Both

Question-82. Which of the following floral parts forms the pericarp after fertilisation?

1. All of these
2. Ovary wall
3. Inner integument
4. Outer integument

Question-83. Which of the following represents the female gametophyte in angiosperms?

1. Embryo
2. Embryo sac
3. Synergid
4. Endosperm

Question-84. Which one of the following represents an ovule, where the embryo sac becomes horseshoe shaped and the funiculus and micropyle are close to each other?

1. Amphitropous
2. Circinotropous
3. Atropous
4. Anatropous

Question-85. Which one of the following represents an ovule, where the embryo sac. becomes horse shoe-shaped and the funiculus and micropyle are close to each other?

1. Anatropous
2. Amphitropous
3. Circinotropous
4. Atropous

Question-86. Which one produce androgenic haploids in anther cultures?

1. Young pollen grains
2. Anther wall
3. Tapetal layer of anther wall
4. Connective tissue

Question-87. While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant

1. Bagging of female flower
2. Emasculation
3. Collection of pollen
4. Dusting of pollen on stigma

Question-88. Wind pollination is common in

1. Legumes
2. Grasses
3. Lilies
4. All of these

Question-89. A typical flower has ______different kinds of whorl.

1. five
2. two
3. three
4. four

Question-90. Anther is typically

1. monosporangiate
2. tetrasporangiate
3. bisporangiate
4. trisporangiate

Question-91. Both chasmogamous and cleistogamous flowers are present in

1. Gossypium
2. Helianthus
3. Lommelina
4. Rosa

Question-92. Egg apparatus consists of

1. egg cell and one synergid.
2. egg cell and antipodal cells.
3. egg cell and central cell.
4. egg cell and two synergids.

Question-93. Exine of pollen grain is formed of

1. sporopollenin
2. callose
3. pecto-cellulose
4. ligno-cellulose

Question-94. Filiform apparatus is found in

1. egg cell
2. synergids
3. anther wall
4. secondary nucleus

Question-95. Flowers are highly modified _______.

1. Leaves
2. Root
3. Shoot
4. Stem

Question-96. megaspore mother cell

1. None of these
2. megasporangium
3. megasporophyll
4. megaspore

Question-97. Microsporogenesis occurs

1. in essential floral organs.
2. on margins of leaves.
3. inside the ovule.
4. inside the anther.

Question-98. One of the most resistant known biological material is.

1. lignocellulose
2. lignin
3. hemicellulose
4. sporopollenin

Question-99. Ovule is

1. rolled megasporophyll
2. megasporangium
3. megasporophyll
4. integumented megasporangium

Question-100. Ovules are attached to a parenchymatous cushion called

1. placenta
2. nucellus
3. obturator
4. conducting tissue

Question-101. Parthenocarpic tomato fruits can be produced by

1. treating the plants with phenylmercuric acetate
2. removing androecium of flowers before pollen grains are released
3. treating the plants with low concentrations of gibberellic acid and auxins
4. raising the plants from vernalized seeds

Question-102. Pollen grain is liberated at

1. two or three celled stage.
2. one celled stage.
3. two celled stage.
4. three celled stage.

Question-103. Pollination by water occurs in

1. All of these
2. Vallisneria
3. Zostera
4. Satvia

Question-104. Proximal end of the filament of stamen is attached to the

1. None of these
2. Thalamus or petal
3. Placenta
4. Connective

Question-105. Seed formation without fertilization in flowering plants involves the process of

1. Sporulation
2. Apomixis
3. Somatic hybridization
4. Budding

Question-106. The functions of tapetum is to

1. store and protect pollen grains.
2. produce ubisch bodies.
3. produce pollen grains.
4. provide nourishment to the developing pollen grains.

Question-107. The most common type of ovule is __________ .

1. campylotropous
2. orthotropous
3. hemitropous
4. anatropous

Question-108. The point at which funiculus touches the ovule is

1. endothelium
2. chalaza
3. hilum
4. raphe

Question-109. Anthersis is a phenomenon which refers to

1. Reception of pollen by stigma
2. Formation of pollen
3. Development of anther
4. Opening of flower bud

Question-110. In a type of apomixis known as adventive embryony, embryos develop directly from the

1. Accessory embryo sacs in the ovule
2. Nucellus or integuments
3. Zygote
4. Synergids or antipodals in an embryo sac

Question-111. In angiosperms all the four microspores of tetrad are covered by a layer which is formed by

1. Sporopollenin
2. Pectocellulose
3. Callose
4. Cellullose

Question-112. In some plants anthers and stigma grow and mature at same time. This phenomenon is called

1. Fusion
2. Homogamy
3. Syngamy
4. Allogamy

Question-113. In which one pair both the plants can be vegetatively propagated by leaf segments?

1. Chrysanthemum and Agave
2. Agave and Kalanchoe
3. Bryophyllum and Kalanchoe
4. Asparagus and Bryophyllum

Question-114. Milky water of tender coconut is

1. Liquid endosperm
2. Liquid gametes
3. Liquid nucellus
4. Liquid female gametophyte

Question-115. Pollen grains are able to withstand extremes of temperature and dissication because their exine is composed of

1. Callose
2. Cutin
3. Suberin
4. Sporopollenin

Question-116. The aleurone layer in maize grain is specially rich in :

1. Proteins
2. Starch
3. Lipids
4. Auxims

Question-117. The arrangement of megaspores in a tetrad in an Angiosperm is

1. Isobilateral
2. Decussate
3. Tetrahedral
4. Linear

Question-118. The pollen tube usually enters the embryosac

1. By Jtnocking off the antipodal cells
2. Through one of the synergids
3. By directly penetrating the egg
4. Between one synergid and central cell

Question-119. The sexual reproduction in plants was first reported by

1. Amici
2. Nawaschin
3. Camererius
4. Hanstein

Question-120. Through which cell of the embryo sac, does the pollen . tube enter the embryo sac?

1. Central cell
2. Egg cell
3. Persistant synergid
4. Degenerated synergid

Question-121. Vegetative propagation by bulbils occur in

1. Curcuma
2. Agave
3. Gingiber
4. Vallisneria

Question-122. What is the direction of micropyle in anatropous ovule?

1. Left
2. Upward
3. Downward
4. Right