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. tetraploid
2. triploid
3. diploid
4. pentaploid

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

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

Question-3. Pine apple fruit develops from

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

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

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

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

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

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

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

Question-7. A dioecious flowering plant prevents both

1. Autogamy and geitonogamy
2. Autogamy and xenogamy
3. Geitonogamy and xenogamy
4. Cleistogamy 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. Wind
2. Animals.
3. Water
4. Insects

Question-9. Adventive embryony in Citrus is due to

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

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. ii and iv
2. i and ii
3. iii and iv
4. i 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. hemitropous
2. campylotropous
3. anatropous
4. orthotropous

Question-12. Anemophily type of pollination is found in

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

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

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

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

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

Question-15. Chief pollinators of agricultural crops are

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

Question-16. Choose the correct statement from the following

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

Question-17. Cleistogamous flowers are

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

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

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

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

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

Question-20. Double fertilization is characteristic of

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

Question-21. Double fertilization is fusion of

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

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

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

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

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

Question-24. During microsporogenesis, meiosis occurs in

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

Question-25. Egg apparatus consists of

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

Question-26. Eight nucleate embryo sacs are

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

Question-27. Embryo sac is also known as

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

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

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

Question-29. Embryo sac is found in

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

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

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

Question-31. Embryo sac occurs in

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

Question-32. Entry of pollen tube through micropyle is

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

Question-33. Female gametophyte of angiosperms is represented by

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

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

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

Question-35. Flowers showing ornithophily show few characteristic like

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

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

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

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

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

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

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

Question-39. Functional megaspore in an angiosperm develops into

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

Question-40. Gloriosa superba exhibits

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

Question-41. Haploid plant cultures are got from

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

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

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

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

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

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

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

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. Pentaploid
2. Tetraploid
3. Triploid
4. Diploid

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-55. In ginger vegetative propagation occurs through

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

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

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

Question-57. Male gametophyte of angiosperms/monocots is

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

Question-58. Nucellus embryo is

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

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

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

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

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

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

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

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

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

Question-63. Point out the odd one

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

Question-64. Pollination occurs in

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

Question-65. Sperm and egg nuclei fuse due to

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

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

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

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

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

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

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

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

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

Question-70. The endosperm of gymnosperms is

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

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

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

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

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

Question-73. The polyembryony commonly occurs in

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

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

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

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

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

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

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

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

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

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

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

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. 24
2. 32
3. 8
4. 16

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. 63
2. 84
3. 81
4. 75

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

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

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

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

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

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. Circinotropous
2. Atropous
3. Anatropous
4. Amphitropous

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. Amphitropous
2. Circinotropous
3. Atropous
4. Anatropous

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

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

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

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

Question-88. Wind pollination is common in

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

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

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

Question-90. Anther is typically

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

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

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

Question-92. Egg apparatus consists of

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

Question-93. Exine of pollen grain is formed of

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

Question-94. Filiform apparatus is found in

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

Question-95. Flowers are highly modified _______.

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

Question-96. megaspore mother cell

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

Question-97. Microsporogenesis occurs

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

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

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

Question-99. Ovule is

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

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

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

Question-101. Parthenocarpic tomato fruits can be produced by

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

Question-102. Pollen grain is liberated at

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

Question-103. Pollination by water occurs in

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

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

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

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

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

Question-106. The functions of tapetum is to

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

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

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

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

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

Question-109. Anthersis is a phenomenon which refers to

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

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

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

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

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

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

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

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

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

Question-114. Milky water of tender coconut is

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

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

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

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

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

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

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

Question-118. The pollen tube usually enters the embryosac

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

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

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

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

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

Question-121. Vegetative propagation by bulbils occur in

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

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

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