NCERT CLASS 12 | TOPIC : SEXUAL REPRODUCTION IN FLOWERING PLANTS | QB-1 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 12 | TOPIC : SEXUAL REPRODUCTION IN FLOWERING PLANTS | QB-1 | NEET BIOLOGY ONLINE TEST

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It contains 100 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 1. Flowers convey important human feelings such as

(a) Love and aff ection (b) Happiness and grief (c) Mourning (d) All of these

2 ➤ 2. Flowers are considered as objects of

(a) Aesthetic value (b) Ornamental value (c) Religious and cultural value (d) All of these

3 ➤ 3. Biologists consider fl owers to be objects of

(a) Morphological marvels (b) Embryological marvels (c) Sites of sexual reproduction (d) All of these

4 ➤ 4. When does plant decides to fl ower?

(a) In embryonic development (b) During the appearance of fl ower buds (c) Before the actual fl ower appear on plant (d) All the above

5 ➤ 5. Identify A, B, C and D in this figure?

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(a) A: Pollen grains, B: Filament (Stalk), C: Line of dehiscence, D: Pollen sacs (b) A: Line of dehiscence, B: Filament (Stalk), C: Pollen sacs, D: Pollen grains (c) A: Filament (Stalk), B: Pollen grains, C: Line of dehiscence, D: Pollen sacs (d) A: Line of dehiscence, B: Pollen sacs, C: Pollen grains, D: Filament (Stalk)

6 ➤ 6. The initiation and development of floral primordium takes place by

(a) Only by hormonal changes in plant (b) Only structural changes in plant (c) Changes in seasonal variation (d) Both by hormonal and structural changes in plant

7 ➤ 7. Whorl of stamens in flower represents

(a) Gynoecium (b) Androecium (c) Calyx (d) Corolla

8 ➤ 8. Whorl of carpel in flower represents

(a) Gynoecium (b) Androecium (c) Calyx (d) Corolla

9 ➤ 9. What indicates ‘A’ in the below figure?

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(a) Pollen grains (b) Pollen sacs (c) Generative cell (d) Vacuoles

10 ➤ 10. Whorl of petals in flower represents

(a) Gynoecium (b) Androecium (c) Calyx (d) Corolla

11 ➤ 11. Whorl of sepals in flower represents

(a) Androecium (b) Gynoecium (c) Calyx (d) Corolla

12 ➤ 12. Stamens consists of which of the following parts?

(a) Filament (b) Style, stigma (c) Anther (d) Both (a) and (c)

13 ➤ 13. The number and length of stamens in flowers are

(a) Variable in different species. (b) Same in plants present in similar climatic condition. (c) Variable and dependent on the amount of hormonal secretion. (d) Variable in different species and depend on the seasonal variation.

14 ➤ 14. Typical angiosperm anther is

(a) Unilobed and dithecous (b) Bilobed and dithecous (c) May be both (a) and (b) (d) Bilobed and tetrathecous

15 ➤ 15. The anther in transverse section appears to be

(a) Diagonal (b) Tetragonal (c) Unilobed (d) Mosaic

16 ➤ 16. What are A, B, C and D in this figure?

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(a) A: Thalamus, B: Style, C: Ovary, D: Stigma (b) A: Style, B: Ovary, C: Stigma, D: Thalamus (c) A: Stigma, B: Style, C: Ovary, D: Thalamus (d) A: Ovary, B: Stigma, C: Thalamus, D: Style

17 ➤ 17. Tetragonal anther consists of

(a) One microsporangia (b) Two microsporangia (c) Three microsporangia (d) Four microsporangia

18 ➤ 18. How many microsporangia are there in each lobe of anther?

(a) One microsporangia (b) Two microsporangia (c) Three microsporangia (d) Four microsporangia

19 ➤ 19. Pollen sacs develop from

(a) Microspore (b) Microspore mother cell (c) Microsporangium (d) Megaspore

20 ➤ 20. Typical microsporangium appear ________ in transverse section.

(a) Wavy (b) Circular (c) Oval (d) Irregular

21 ➤ 21. Which one amongst the given perform the function of protection in typical microsporangium?(A) Epidermis (B) Endothecium(C) Tapetum (D) Middle layer

(a) A and B (b) A and C (c) A and D (d) A, B and D

22 ➤ 22. Which of the following layer of microsporangium provides nourishment to the developing anther?

(a) Middle layers (b) Tapetum (c) Endothecium (d) Epidermis

23 ➤ 23. Function performed by the outer three layers of microsporangium?

(a) Protection to developing pollen (b) Provides nourishment to developing pollen (c) Helps in the dehiscence of anther to release pollen (d) Both (a) and (c)

24 ➤ 24. Identify the parts A to I in this figure.

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(a) A: Ovary, B: Anther, C: Filament, D: Nectariferous area, E: Sepal, F: Stigma, G: Style, H: Ovule, I: Petal (b) A: Anther, B: Ovule, C: Stigma, D: Anther, E: Petal, F: Filament, G: Sepal, H: Nectariferous area, I: Ovary (c) A: Ovary, B: Ovule, C: Nectariferous area, D: Sepal, E: Filament, F: Petal, G: Anther, H: Stigma, I: Style (d) A: Style, B: Stigma, C: Anther, D: Petal, E: Filament, F: Sepal, G: Nectariferous area, H: Ovule, I: Ovary

25 ➤ 25. The microsporangium cells which posses dense cytoplasm and have more than one nucleus is the characteristic of

(a) Middle layers (b) Tapetum (c) Endothecium (d) Epidermis

26 ➤ 26. In young anther the tissue occupying the centre of each microsporangium is called

(a) Megaspore mother cell (b) Sporogenous tissue (c) Parietal tissue (d) None of these

27 ➤ 27. Identify A to E in this figure?

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(a) A: Synergids, B: Egg, C: Central cell, D: 2 polar nuclei, E: Antipodals (b) A: Antipodals, B: Synergids, C: Central cell, D: Egg, E: 2 polar nuclei (c) A: Synergids, B: Central cell, C: 2 polar nuclei, D: Antipodals, E: Egg (d) A: Egg, B: 2 polar nuclei, C: Antipodals, D: Central cell, E: Synergids

28 ➤ 28. Arrange the following layers of microsporangium according to their presence from inside to outside.(A) Endothecium (B) Middle layer(C) Tapetum (D) Epidermis

(a) A, B, C, D (b) B, A, C, D (c) D, C, B, A (d) C, B, A, D

29 ➤ 29. Sporogenous tissue of microsporangia is

(a) Groups of compactly arranges homogenous cells (b) Occupies the centre of microsporangium (c) Present inside young anther (d) All the above

30 ➤ 30. Each cell of microspore tetrad is

(a) 2n (b) n (c) Some n and some 2n (d) 3n

31 ➤ 31. Which type of cell division occurs in the cell of sporogenous tissue to form microspore?

(a) Reduction division (b) Equational division (c) Both (a) and (b) (d) Amitosis

32 ➤ 32. Formation of pollen from pollen mother cell is referred to as

(a) Pollenogenesis (b) Megasporogenesis (c) Microsporogenesis (d) Ovulation

33 ➤ 33. Pollen grains are

(a) Microspore tetrad (b) Dehydrated microspores (c) Megaspore tetrad (d) Pollen mother cells

34 ➤ 34. Male gametophyte in angiosperm is represented by

(a) Anther (b) Androecium (c) Microsporangium (d) Pollen grain

35 ➤ 35. Pollen grains are

(a) Spherical (b) Oval (c) Generally spherical (d) Irregular

36 ➤ 36. Diameter of pollen grain is

(a) 20–50 μm (b) 25–50 μm (c) 30–50 μm (d) 10–50 μm

37 ➤ 37. Exine of pollen is (A) Hard outer layer of pollen grain(B) Most resistant organic matter known.(C) Layer made up of sporopollenin.(D) Layer which can withstand high temperature, strong acids and alkali.(E) Layer which cannot be degraded by any known enzyme.Which one of the following is correct?

(a) A and B (b) A, B, C and D (c) A, B, C, D and E (d) A, C and E

38 ➤ 38. What are the parts A and B in this figure?

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(a) A: Generative cell, B: Vegetative cell (b) A: Tapetal cell, B: Generative cell (c) A: Vegetative cell, B: Generative cell (d) A: Homogenous cell, B: Tapetal cell

39 ➤ 39. Sporopollenin is

(a) Most resistant organic matter known (b) Present in exine of pollen grain (c) Absent in the germ pole of pollen grain (d) All of these

40 ➤ 40. Pollen grains can be preserved as fossil because

(a) They vary from species to species (b) They have variety of architecture (c) They are made up of sporopollenin (d) They exhibit a fascinating array of pattern and design

41 ➤ 41. Which part of pollen exhibit a fascination array of pattern and design?

(a) Intine (b) Exine (c) Germ pore (d) None of these

42 ➤ 42. Intine of pollen grain is

(a) Inner layer of pollen grain (b) A thin and continuous layer (c) Made up of cellulose and pectin (d) All of these

43 ➤ 43. What does ‘A’ indicate in this figure?

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(a) Scutellum (b) Shoot apex (c) Radicle (d) Coleorhiza

44 ➤ 44. What ‘C’ is showing in the given figure?

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(a) Epiblast (b) Scutellum (c) Shoot apex (d) Radicle

45 ➤ 45. Identify the part ‘D’.

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(a) Radicle (b) Root cap (c) Coleorhiza (d) Epiblast

46 ➤ 46. What is ‘G’ in the given figure?

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(a) Scutellum (b) Coleorhiza (c) Coleoptile (d) Shoot apex

47 ➤ 47. What is ‘B’ in the given figure?

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(a) Scutellum (b) Coleorhiza (c) Coleoptile (d) Shoot apex

48 ➤ 48. Pollen grains are mature when

(a) It contains vegetative and generative cell (b) It contains only single haploid cell (c) Contains two haploid cell (d) Both (a) and (c)

49 ➤ 49. Thin and continuous layer of pollen made up of cellulose and pectin

(a) Intine (b) Exine (c) Germ pore (d) None of these

50 ➤ 50. Pollen grains are shed in 2 celled stage in

(a) > 90% Angiosperm plant (b) < 50% Angiosperm plant (c) > 60% Angiosperm plant (d) < 40% Angiosperm plant

51 ➤ 51. Generate cell floats in the cytoplasm of

(a) Vegetative cell (b) Microspore mother cell (c) Pollen mother cell (d) Megasporangium

52 ➤ 52. The below figure represents

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(a) Self-pollinated flowers (b) Cross-pollinated flowers (c) Chasmogamous (d) None of these

53 ➤ 53. The bigger cell that receives abundant food and has irregularly shaped nucleus is called

(a) Generative cell (b) Vegetative cell (c) Germ cell (d) Sperm cell

54 ➤ 54. The spindle-shaped cell with dense cytoplasm and nucleus in pollen grain is called

(a) Vegetative cell (b) Generative cell (c) Sperm cell (d) Egg cell

55 ➤ 55. Match the following

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A. Vegetative cell 1. Sporopollenin

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B. Generative cell 2. Spindle-shaped cell

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C. Exine 3. Large sized and has abundant food reserve

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D. Intine 4. Cellulose and pectin

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(a) A:1, B:2, C:3, D:4 (b) A:4, B:3, C:2, D:1 (c) A:3, B:2, C:1, D:4 (d) A:2, B:1, C:4, D:3

56 ➤ 56. Male gametes in angiosperms are formed by

(a) Mitotic division in vegetative cell (b) Meiotic division in pollen mother cell (c) Meiotic division in vegetative cell (d) Mitotic division in generative cell

57 ➤ 57. The pollen grains are shed in 3 celled stage in

(a) > 60% Angiospermic plant (b) > 70% Angiospermic plant (c) < 40% Angiospermic plant (d) < 20% Angiospermic plant

58 ➤ 58. Which of the following statement is correct?(A) Pollen grains are shed in 2-celled stage in > 40% plants.(B) Pollen grains are shed in 3-celled stage in < 60% plant.(C) Generative cell divides meiotically to form male gametes.(D) Intine of pollen is made up of sporopollenin.

(a) A, B, C (b) All are correct (c) All are wrong (d) Only C

59 ➤ 59. The plant which came in India as a contaminant with imported wheat is?

(a) Vinca (b) Parthenium (c) Striga (d) Orobanche

60 ➤ 60. The below figure represents

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(a) Self-pollinated flowers (b) Cross-pollinated flowers (c) Cleistogamous flowers (d) None of these

61 ➤ 61. Which one of the following is incorrect?

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(A) Parthenium or carrot gases causes pollen allergy.

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(B) Vegetative cell of pollen has abundant food reserve.

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(C) All pollen’s cause severe allergies and bronchial afflictions.

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(D) Sporopollenin is the most resistant organic matter known.

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(a) All are correct (b) A (c) B (d) C

62 ➤ 62. What are A and B in this figure?

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(a) A: Chasmogamous flower,B: Cleistogamous flower (b) A: Cleistogamous flower,B: Chasmogamous flower (c) A: Chasmogamous flower,B: Chasmogamous flower (d) A: Cleistogamous flower,B: Self-pollinated flower

63 ➤ 63. Pollen grains (A) Represent gametophytic phase of plant(B) Can cause severe allergies like asthma and bronchitis (C) Are rich in nutrient(D) Are used as food supplements(E) Are available in form of tables and syrups in market of western countries

(a) Only A is correct (b) All are correct (c) All are wrong (d) Only A, B and C are correct

64 ➤ 64. Viability of pollen grains depend upon

(a) A particular species (b) Prevailing temperature (c) Humidity (d) All of the above

65 ➤ 65. Rice pollen grains are viable for

(a) 6.0 mins (b) 30 mins (approx) (c) 60 mins (approx) (d) 40 mins

66 ➤ 66. Pollens are stored in

(a) Oxygen (–19 (b) Nitrogen (–196°C) (c) Oxygen (196°C) (d) Nitrogen (+196°C)

67 ➤ 67. Syncarpous condition is referred to as

(a) Gynoecium containing single pistil (b) More than one pistil fused together (c) More than one pistil free from one another (d) Gynoecium containing many pistils

68 ➤ 68. Landing platform for pollen grains is

(a) Stigma (b) Style (c) Ovary (d) None of them

69 ➤ 69. Bulged basal part of pistil is

(a) Stigma (b) Style (c) Ovary (d) None of these

70 ➤ 70. Elongated slender part of pistil is

(a) Stigma (b) Style (c) Ovary (d) None of these

71 ➤ 71. Megasporangia is referred to as

(a) Ovule (b) Ovary (c) Gynoecium (d) All of these

72 ➤ 72. What are parts A to E in this below figure?

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(a) A: Plumule, B: Cotyledons, C: Hypocotyl, D: Radicle, E: Root cap (b) A: Root cap, B: Hypocotyl, C: Plumule, D: Radicle, E: Cotyledons (c) A: Cotyledons, B: Root cap, C: Cotyledons, D: Plumule, E: Hypocotyl (d) A: Plumule, B: Cotyledons, C: Root cap, D: Radicle, E: Hypocotyl

73 ➤ 73. Plants having single ovule in ovary are

(a) Wheat (b) Paddy (c) Mango (d) All of these

74 ➤ 74. What represents ‘A’ in the following figure?

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(a) Cotyledons (b) Scutellum (c) Shoot apex (d) Radicle

75 ➤ 75. More than one ovule is found in the ovary of

(a) Wheat (b) Paddy (c) Papaya (d) None of these

76 ➤ 76. The stalk attaching ovule to placenta is

(a) Funiculus (b) Hilum (c) Raphe (d) Chalaza

77 ➤ 77. The junction between ovule and funiculus is

(a) Placenta (b) Hilum (c) Raphe (d) Chalaza

78 ➤ 78. The tips on the ovule where integument are absent are called

(a) Germ pore (b) Micropyle (c) Both (a) and (b) (d) None of these

79 ➤ 79. The end opposite to micropyles end is called

(a) Funicle (b) Chalaza (c) Germ pore (d) Hilum

80 ➤ 80. The mass of cell present inside the integuments of megasporangium having abundant food reserve is

(a) Ovule (b) Nucellus (c) Sporogenous cells (d) None of these

81 ➤ 81. Female gametophyte of angiosperm is referred to as

(a) Megasporangium (b) Megaspore (c) Embryo sac (d) Nucleus

82 ➤ 82. Embryo sac is formed by

(a) Reduction division in megaspore (b) Equational division in megaspore (c) Reduction division followed by equational division in megaspore mother cell (d) Both (b) and (c)

83 ➤ 83. How many embryo sacs are present in an ovule?

(a) One embryo sac (b) More than one embryo sac (c) One embryo sac (generally) (d) Two embryo sacs

84 ➤ 84. What is functional megaspore referred to as?

(a) The megaspore that degenerates after formation. (b) The megaspore that only develops in female gametophyte. (c) The megaspore that undergoes reduction division. (d) The megaspore that is functionally inactive.

85 ➤ 85. Identify the parts of A to F in the following figure?

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(a) A: Filiform apparatus, B: Polar nuclei, C: Antipodals, D: Synergids, E: Egg, F: Central cell (b) A: Antipodals, B: Polar nuclei, C: Central cell, D: Egg, E: Synergids, F: Filiform apparatus (c) A: Antipodals, B: Central cell, C: Polar nuclei, D: Egg, F: Synergids, G: Filiform apparatus (d) A: Eggs, B: Central cell, C: Filiform apparatus, D: Polar nuclei, E: Antipodals, F: Synergids

86 ➤ 86. Monosporic development is referred to as

(a) Single megaspore developing in the embryo sac (b) Single megaspore mother cell undergoing meiosis (c) Presence of single ovule in ovary (d) None of them is correct

87 ➤ 87. What is the ploidy level of nucleus, MMC, functional megaspore and female gametophyte?

(a) 2n, n, 2n, 2n (b) 2n, n, 2n, n (c) 2n, 2n, n, n (d) n, 2n, n, n

88 ➤ 88. How many mitotic division takes place for complete development of embryo sac?

(a) 4 (b) 3 (c) 2 (a) 1

89 ➤ 89. The inside three mitotic division which occurs in the megaspore are

(a) Followed by cytoplasmic division immediately. (b) Strictly free nuclear not immediately followed by cell wall formation. (c) Wall formation occurs after the completion of the second mitosis. (d) Wall formation will never occur.

90 ➤ 90. Typical female gametophyte is

(a) 7-celled 8 nucleate (b) 6-celled 8 nucleate (c) 4-celled 6 nucleate (d) 5-celled 6 nucleate

91 ➤ 91. What is ‘A’ in this figure?

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(a) Megaspore mother cell (b) Megaspore tetrad (c) Embryo sac (d) Micropyle

92 ➤ 92. Egg apparatus consists of

(a) Two synergids (b) Two antipodals (c) Egg cell (d) Both (a) and (c)

93 ➤ 93. The cellular thickening at the tip of micropyle is

(a) Synergids (b) Egg apparatus (c) Filiform apparatus (d) All of these

94 ➤ 94. The cells located at chalazal ends are called as

(a) Synergids (b) Antipodals (c) Egg apparatus (d) None of these

95 ➤ 95. Identify the parts A and B in this figure.

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(a) A: Megaspore tetrad, B: Nucleus (b) A: Central cell, B: Megaspore dyad (c) A: Nucellus, B: Megaspore mother cell (d) A: Nucellus, B: Central cell

96 ➤ 96. The central cell

(a) Contains two haploid nuclei (b) Has two polar nuclei (c) Located in the centre of embryo sac (d) All of these

97 ➤ 97. The cells in embryo sac located at the micropyles end are

(a) Egg apparatus (b) Only synergid (c) Antipodal cell (d) Central cell

98 ➤ 98. The male and female gametes of angiosperm are respectively

(a) Motile, non-motile (b) Non-motile, motile (c) Motile, motile (d) Non-motile, non-motile

99 ➤ 99. After three meiotic divisions in the functional megaspore, the gametophyte (embryosac) has how many cells.

(a) 7 cells (b) 4 cells (c) 5 cells (d) 8 cells

100 ➤ 100. Pollination is essential in angiosperm plants because

(a) It decreases the time required for fertilization. (b) Both of the male and female gametes are non-motile and they need to be brought together for fertilization. (c) It is a useless process (d) Both (a) and (b)

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