12th Biology Question

 12th Inter Exam 2020 BiologySexual Reproduction Flowering Plants” Chapter VVI Objective Question With Answer On Latest Pattern, Biology VVI Important Objective Model Set Question Answer All ChapterWise Available

12th Biology “Sexual Reproduction Flowering Plants” Chapter VVI Objective Question With Answer



1. When the pollen grains are transferred by the agency of air, this type of pollination is called

(A) anemophily

(B) entomophily 

(C) ornithophily

(D) myrmecophily

2. The female gametophyte of a typical dicot is also called Polygonum type of embryo sac. At the time of fertilization mature embryo sac is

(A) 7celled. 7-nucleate

(B) 7celled. 8nucleate 

(C) 8celled, 7nucleate 

D) 8celled, 8-nucleate

3. When pollination takes place between two flowers on the same plant, the process is known as

(A) xenogamy 

(B) geitonogamy

(C) porogamy 

(D) entomophily

4. When the body of the ovule, embryo sac, micropyle and funicle, all lie in one straight plane, the ovule is known as

(A) orthotropous

(B) amphitropous 

(C) anatropous

(D) campylotropous 

5. When the ovule is curved, and along with ovule the embryo sac becomes horse-shoe shaped, such an ovule is called

(A) anatropous 

(B) circinotropous

(C) amphitropous

(D) orthotropous 

6. The embryo sac is called monosporic when it develops from 

(A) all the four megasporest

(B) two functional megaspores only

(C) three micropylar megaspores only

(D) one of the four megaspores which becomes functional 

7. Pollination by birds is called werd 

(A) entomophily

(B) myrmecophily 

(C) ornithophily

(D) cheiropterophily

8. Which one is a false fruit? 

(A) Mango

(C) Rice 

(D) Apple

9. When pollination takes place by means of bees, it is called 

(A) melittophily

(B) myrmecophily. 

(C) ornithophily

(D) cheiropterophily 

10. Which of the following is a true fruit? 

(A) Coconut 

(B) Apple

(C) Pear 

(D) Cashew 

11. The edible part in Litchi is 

(A) endosperm 

(B) mesocarpa

(C) fleshy aril 

(D) pericarp 

12. Anemophily can be best seen in 

(A) sunflower 

(B) maize

(C) fi

(D) yucca 

13. The outer wall (exine) of a pollen grain is composed of one of the most resistant biological materials, known as

(A) tannin 

(B) pectocellulose

(C) sporopollenin 

(D) lignin 

14. Flowers pollinated by snail and slug are called 

(A) ornithophilous

(B) cheiropterophilous 

(C) malacophilous

(D) entomophilous 

15. Syngamy refers to fusion of one of the sperm with 

(A) egg 

(B) synergids

(C) secondary nucleus 

(D) egg and the other secondary nucleus

16. Endosperm cell of an angiosperm has the chromosomes. The number of chromosomes in the gametes would be

(A) 8 

(B) 16

(C) 24

(D) 48

17. How many chromosomes are present in endosperm? 


(B) 2n

(C) 3n 

(D) both ‘A’and C 

18. The number of meiotic divisions required to produce 400 seeds in a pea plant is

(A) 400 

(B) 500

(C) 600 

(D) 800 

19. Aleurone layer is present in .

(A) cotyledons 

(B) the peripheral part of scutellum 

(C) the outermost layer of endosperm

(D) the peripheral part of coleoptile 

20. Which of the following is not correct about pome? 

(A) True fruit remains inside the swollen thalamus.

(B) Fruit develops from an apocarpous, superior ovary.

(C) Seeds develop inside the locules. 

(D) Wall of the ovary is thin like a paper. 

21. Transfer of pollen grains from anther to the stigma of a different plant is called

(A) xenogamy 

(B) xenia

(C) geitonogamy

(D) cleistogamy

22. Which of the following is not a part of ovule (megasporan gium)?

(A) Integuments

(B) Nucellus

(C) Chalaza 

(D) Endothecium 

23. Entomophily is pollination through 

(A) water 

(B) insects

(C) animals 

(D) air 

24. The process of formation of microspores from a pollen 

mother cell through meiosis is called 

(A) megasporogenesis

(B) microsporogenesis

(C) microgametogenesis

(D) megagametogenesis 

25. Removal of anthers from the flower bud before the anther dehisces, is called

(A) bagging 

(B) artificial pollination

(C) emasculation

(D) hybridization

26. Scutellum is a part of 

(A) grass cotyledon

(B) dicot cotyledon 

(C) maize endosperm

(D) pericarp

27. Formation of an extra embryo from the nucellus or integument is called

(A) polyspermy 

(B) apomixis 

(C) parthenocarpy

(D) polyembryony

28. The edible part in coconut is endosperm. Which part of the endosperm is called liquid syncytium?

(A) Liquid endosperm in the coconut seed

(B) Endosperm meat

(C) Outermost layer of endosperm

(D) All of these 

29. The single shield-shaped cotyledon in monocot is called 

(A) epiblast 

(B) coleorrhiza

(C) coleoptile 

(D) scutellum  

30. When anthers mature prior to maturity of stigma, it is called

(A) protogyny

(B) heterostyly 

(C) dichogamy

(D) protandry

31. Which one is not a part of anther wall? 

(A) Endothecium

(B) Endothelium

(C) Tapetum 

(D) Middle layers

32. Anemophily is pollination through 

(A) batirtis 

(B) air

(C) birds 

(D) snail 

33. Pollen grains are well preserved as fossils because of the 14 presence of 

(A) sporopollenin

(B) thin exine 

(C) thick intine

(D) spiny exine 

34. Egg apparatus consists of 

(A) egg cell

(B) synergids

(C) both egg cell and synergids 

 (D) antipodals 

35. Which of the following devices is not used by plants to prevent autogamy?

(A) Selfincompatibility

(B) Production of unisexual flowers

(C) Heterostyly 

(D) Production of cleistogamous flowers


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36. The fusion of male gametes with secondary nucleus is called 

(A) syngamy 

(B) triple fusion

(C) geitonogamy

(D) cleistogamy 

37. Ruminate endosperm is found in 

(A) Asteraceae 

(B) Fabaceae

(C) Euphorbiaceae

(D) Annonaceae

38. Plants of which one of the following groups of genera are pollinated by the same agency?

(A) Ficus, Bombax, Casuarina

(B) Triticum, Phoenix, Zea

(B) Kigelia, Yucca, Cocos

(D) Salvia, Jatropha, Morus 

39. Cleistogamous flowers are 

(A) insect pollinated

(B) bat pollinated

(C) self pollinated

(D) water pollinated 

40. The process of double fertilization was discovered by 

(A) Strasburger 

(B) P Maheshwarium

(C) Nawaschinen

(D) Amici 

41. Milky water of green coconut is 

(A) liquid female gametophyte

(B) secretion of seedcoat

(C) liquid endosperm

(D) degenerated nuclear tissue 

42. What is fertilization

(A) Fusion of egg and male nucleus

(B) Fusion of egg and secondary nucleus 

(C) Fusion of egg and synergid

(D) None 

 43. In which of the following plants does cleistogamy occur 

(A) Dhatura 

(B) Petuniables

(C) Commelina

(D) Gladiolus

44. The part of a flower in which two generation is found? 

(A) Germinated pollen grain

(B) Seed

(C) Unfertilized ovule 

(D) Embryo 

45. The most common type of ovule in angiosperms is 

(A) Amphitropous

(B) Atropous 

(C) Anatropous

 (D) Synotropus 

46. What will be chromosomes number in Aleurone layer of cells if the number of chromosome in synergids of a plant species is 8? 

(A) 16

(B) 24

(C) 32 

(D) 8

47. Level mechanism of pollination is found in 

(A) Anthirrhinum

(B) Ficus

(C) Wheat 

(D) Salvia 

48. Double fertilization result into 

(A) Cotyledon 

(B) Ovule

(C) Endosperm 

(D) Embryo 

49. Hypanthodium inflorescene is found in 

(A) Peepal 

(B) Tulsi

(C) Sagaun 

(D) Madar 

50. In which of the following there is formation of seed but not flower?

(A) Maize 

(B) Minture

(C) Peepal 

(D) Pinus 

51. Which one is land fruits in the following

(A) Potato 

(B) Groundnut

(C) Onion rate

(D) Turmeric

 52. In which seed there is consumption of endosperm in CA developing embryo

(A) Coconut 

 (B) Caster

(C) Pea

(D) Maize 

53. Anemophilous flowers are usually? 

(A) attractive 

(B) small

(C) colourless

(D) both Band C

54. Female gametophyte of angiosperms is called 

(A) Endosperm 

(B) Embryosac

(C) Embryo 

(D) Zygoten

55. Egg apparatus consists of 

(A) Egg 

(B) Egg & polar nucleus

(C) Egg & Antipoldal cells

(D) Egg & Synergids

56. Cross pollination is beneficial because it results in 

(A) formation of male offsprings

(B) weaker progeny 

(C) better progeny 

(D) fromation of seeds 

57. The deposition of pollen grains on the stigma of another flower of the same plant is called

(A) dichogamy

(B) geitonogamy 

(C) Xenogamy

(D) hydrogamy 

58. Which in the following is absent in Endosperm? 

(A) Egg

(B) Two polar nuclei 

(C) Macrosporophytic cell

(D) Antipodals 

59. Which in the following is absent in Anther cell? 

(A) Endothecium

(B) Middle lamella

(C) Tapetum 

(D) Integument 

60. Aril is edible in which of the following fruits? 

 (A) Myristica 

(B) Litchi

(C) Annona 

(D) All of these 

61. The part where ovule is attached with funicules is called 

(A) Chalaza 

(B) Micropyle

(C) Thallus 

(D) Nucellus

62. The stalk of ovule is called

(A) Funiculus 

(B) Caruncle

(C) Nucellus 

(D) Pedical

63 The germination of seed in which cotyledon comes on land 

is called

(A) Hypocotyl 

(B) Epicotyl

(C) Heterothaly

(D) None 

64. The father of Indian Angiospermic Embryology is 

(A) B. M. Johry Belt

(B) B. L. Swamy

(C) R. N. Kapil 

(D) P. Maheshwar

65. Aril is edible in 

(A) Annona 

(B) Apple

(C) Orange 

(D) All 

66. In pollen grains which vitamins is mainly found?

(A) vitamin B

(B) vitamin A

(C) vitamin

(D) vitamin C

67. The study of pollen & spore is called 

(A) Palynology

(B) Morphology

(C) Phycology 

(D) Cytology

68. The process of production of seed without fertilization is called 

(A) apomixis 

(B) pollination

(C) triple fusion

(D) None 

69. Pollination by insects is called 

(A) Ornithophily

(B) Entomophily 

(C) Hydrophily

(D) Chiropterophily

70. The male reproductive unit of a flowering plant is. 

(A) Stamen 

(B) Pistil

(C) Pollen sac 

(D) Pollen die

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71. The female reproductive unit of a flowering plant is called 

(A) Pistil 

(B) Stamen

(C) Pollen sac 

(D) None 

72. The clearly visible pore or stomata in outer coat of pollengrain is called

(A) Exine 

(B) Inner coat

 (C) Germinal pore

(D) Germ cell

73. Pollen sac is a 4-celled structure in which found at its four corner?

(A) Microsporphyte

(B) Pollenkit

(C) Tapetum 

(D) Protoplasm

74. Which one is the following is an aquatic grass? 

(A) Vallisinaria 

(B) Hydrilla 

(C) Zostera

(D) All 

75. Which one is the male reproductive part of a flower? 

(A) Gynoecium 

(B) Androecium

(C) Pistil 

(D) Ovary 

76. Which one is the female reproductive part of a flower? 

(A) Gynoecium 

(B) Androecium

(C) Stamen 

(D) Pollen 

77. Process of fusion of haploid cells is 

(A) Cell cycle 

(B) Meiosis

(C) Mitosis 

(D) Syngamy

78. Function of tapetum is 

(A) Protective 

(B) Nutritive

(C) Respirator

(D) All of the above

79. Sexual reproduction of flowering plants was discovered by 

(A) Camerarius 

(B) Nawaschin

(C) Strasburger

(D) Maheswari

80. The pollen is

(A) haploid 

(B) diploid

(C) triploid 

(D) tetraploid

81. Polyembryony is maximum in 

(A) Gymnosperm

(B) Pteridophyte

(C) Angiosperms

(D) Bryophytes

82. How many mitotic division will take place in the formation of 100 pollen grains?

(A) 100 

(B) 50 

(C) 25 

(D) 20

83. Diploid is 

(A) egg 

(B) pollen

(C) both Aand ‘B

(D) zygote

84. For self pollination, a flower should be pas 

(A) asexual 

(B) monosexual

(C) unisexual 

(D) bisexuales

85. Egg apparatus is made up of 3

(A) egg cell

(B) synergids

(C) antipodals 

(D) Both A& B‘ 

86. The microspore mother cell in a pollen sac of anther is 

(A) diploid 

(B) haploid

(C) tripolido

(D) polyploid

87. Pollen grain with pollen tube represents 

(A) male sporophyte

(B) male gametophyte 

 (C) female sporophyte .

(D) female gametophyte 

 88. How many nuclei are present in a mature pollen? 

(A) 1

(C) 3 

(D) 4 

89. If 24 chromosome is found in endosperm of an angiosperms, then the no. of chromosome in gamete is

(A) 8 

(B) 1

(C) 24 

 (D) 48 

90. Number of chromosomes in root cell is 14. What will be the number in synergids? 

(A) 14 

(B) 21


(D) 28 

91. Proteinaceous endosperm of maize is called 

(A) apophysis 

(B) scutellum

(C) coleoptile 

(D) aleurone layer 

92. One meiosis produces how many male gametes?

(A) 4

(B) 21

(C) 2

(D) 8 

93. Pollination by Ants is called 

(A) Ornithophily

(B) Myrmecophily

(C) Malacophily 

(D) Chropterophily 

94. Usually endosperm of carpsella is 

(A) Haploid 

(B) Diploid

(C) Triploid 

(D) Polyploid 

95. Anther represents a vente 

(A) sporogonium

(B) male gametophyte 

(C) male sporophyll

(D) sporangium

96. Pollination induces the abscission of all floral organs except one. That organ is

(A) anther 

(B) pistil

(C) sepals 

(D) receptacles

97. Edible part of Litchi is 

(A) endosperm 

(B) Mesocarp

(C) Fleshy aril 

(D) Pericarp 

98. A typical angiospermic endosperm is 

(A) Onecelled 

(B) Twocelled

(C) Five celled

(D) Seven celled

99. Which one of the following is insectivorous plant? 

(A) Drosera 

(B) Nepenthes 

(C) Both A& B

(D) Hydrila

100. In oyule meiosis takes place in 

(A) Synergids 

(B) Macrospore mother cell

(C) Microsporophyte

(D) Archesporium

101. In orthotropus ovule the micropyle & Hilum are 

(A) Obliquely to funiculus

(B) at 90° to funiculus

(C) linear to funiculus

(D) parallel to funiculus 

102. Aril is absent in which of the following

(A) Annona 

(B) Litchin

(C) Mango 

(D) Myrristica 

103. Which in the following forms endosperm by the fusion with male gamete? 

(A) Unfertilized

(B) Secondary cell

(C) Antipodals 

(D) Secondary Nucleus 

104. Air pollinated flower is commonly 

(A) attractive 

(B) stunted pe

(C) colourless 

(D) both Band C


105. The maximum number of chromosome in a flowering plant Litorosa is 2n = 265, then the minimum number is

(A) 2n =

(B) 2n = 14

(C) 2n=

(D) 2n = 16 

106. There is 10 pair chromosome in Maize. How many linkage group will be?

(A) 20 

(B) 40

(C) 10 


107. A typical example of cross pollination is 

(A) Wheat 

(B) Tomato

(C) Potato 

(D) Maize 

108. Maturation of gynoecium before anther of the same flower is

(A) Protogyny 

(B) Protandry

(C) Heterogamy

(D) Autogamy

109. Cytoplasm of pollen grain is rich in mal 

(A) fat and starch

(B) sulphur

(C) chromoplast

(D) etiolin 

110. Perisperm is the remaining part of 

(A) nucellus 

(B) embryo

(C) endosperm 

(D) integumen

111. Cleistogamous flowers are always in proces

(A) Selfpollinated.

(B) Crosspollinated

(C) Both 

(D) None 

112. The developing pollen derives its nutrition from 

(A) tapetum 

(B) endothecium in

(C) middle layers

(D) SMC 

113. Pollination is the characteristic of

(A) Bryophytes and Angiosperms

(B) Peteridophytes and Angiosperms

(C) Angiosperms and Gymnosperms

(D) Angiosperms and Fungi

114. When the anthers and stigma in an intersexual flower mature at the same time, it is known as 

(A) allogamy 

(B) dichogamy

(C) homogamy

(D) syngamy 

115. The outermost resistant layer of any pollen grain is made up of

(A) Tannin 

(B) Pectocellulose 

(C) Sporopollenina

(D) Ligning

116. Anemophily occurs in 

(A) Salvia 

(B) Vallisneriat

(C) Coconut 

(D) Bottle brush

117. Which of the following will help in making early germination of pollen on stigma? 


(B) Ca

(C) Mo 

(D) CI 

118. If body of an ovule, embryo sac, micropyle & funicle are errect in one plane, then it is called

(A) orthotropous

(B) amphiltropous 

(C) anatropous

(D) Campylotropous

119. If ovule is curved and embryosac is horse-shoe shaped, it is 


(A) anatropous 

(B) circinotropous

(C) amphitropous

(D) orthotropous

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120. If transfer of pollen grain occurs by air, it is called 

(A) Anemophily

(B) entomophily 

(C) Ornithophily

(D) Myrmecophily

121. Which in the following has cleistogamy? 

(A) Dhatura 

(B) Pitunia

(C) Comelina 

(D) Gladiolus

122. If pollination occurs between two flowers of a plant, it is called

(A) Xenogamy

(B) Geitonogamy

(C) Posagamy 

(D) Entomophily

123. If pollination occurs by Honey bee, it is called 

(A) Ornithophily

(B) Myrmecophily 

(C) Melittophily

(D) Chiropterophily

124. Pollination by birds is called 

(A) entomophily

(B) myrmecophily 

(C) ornithophily

(D) chiropterophily

125. When a flower is brightly coloured and sacretes nectar, it is most probably 

(A) pollinated by wind

(B) pollinated by insects

(C) an insectivorous plants

(D) sterile flower 


126. Autogamy is favoured by 

(A) homogamy

(B) heterostyle 

(C) dichogamy

(D) self sterility

127. The central cell of endosperm is 

(A) Primary nucleus

(B) Secondary nucleus 

(C) Synergids

(D) Both A& B

128. Chemically pollen kit is made up of a

(A) proteins 

(B) lipids and carotenoids

(C) carbohydrates and carotenoids

(D) sporopollenium 

129. Male gametophyte of angiosperms/monocots is 

(A) Microsporangium

(B) Nucellus

(C) Microspore 

(D) Stamen

130. In angiosperms, all the four microspores of a tetrad are covered by a layer formed of

(A) cellulose 

(B) sporopollenin

(C) pectose 

(D) callose 

131. MMC has 24 chromosmes. What will be the number of chromosomes in its endosperm? 

 (A) 12 


(B) 24

(C) 36 

(D) 48 

132. The father of Modern embryology is dern embryology 

(A) Schleiden and Schwann

(B) Hertwig

(C) Aristotle

(D) Von Baer 

133. Endosperm provides food to the growing 

(A) seeds 

(B) fruits

(C) endosperm 

(D) embryo 

134. In angiosperms the fertilization occurs in 

(A) nucellus 

(B) embryo sac

(C) ovary 

(D) ovule

135. Tapetum which develops into ovule is called 

(A) amoeboid tapetum

(B) glandular tapetum

(C) integumentary tapetum  

(D) flagellar tapetum 

136. Arrangement of nuclei in normal dicot embryo sac is 

(A) 3 + 3 +

(B) 2 + 3 + 3

(C) 3 + 2 +

(D) 2 + 4 + 2

137. Largest cell in the ovule is 


(B) antipodal 

(C) central cell

(D) size of cells variable 

138. Sporogenesis is 

(A) development and formation of spores

(B) production of mitosporesv

(C) production of meiospores

(D) formation of zygote and embryo.

139. A monothecous anther with two microsporangia is found in 

(A) Brassica 

(B) Corianders

(C) Legumes

(D) Hibiscus 

140. Polynology is the study of 

(A) Pallen grains

(B) Palms

(C) Flowers 

(D) Fruits 

141. Which is diploid structure? 

(A) Pollen grains

(B) Eg

(C) Megaspored


142. The tissue which attaches the ovules inside the ovary is 

(A) Funicle

(B) Hilum

(C) Placenta 

(D) Chalaza

143. Which Thalamus in the following is edible? 


(A) Annona

(B) Apple

(C) Orange 

(D) Litchi 

144. Point out the odd one 

 (A) archesporium

(B) oogonium

(C) ovule

(D) antheridium 

145.  Micropyle is found in 

(A) ovule 

(B) seed

(C) ovule and seed both

(D) fruit Pod

146. Female gametophyte is represented by 

(A) ovule 

(B) embryo sac

(C) megaspore mother cell

(D) megasporephyll 

147. The female gamete of angiosperm is represented by 

(A) egg 

(B) carpel

(C) pollen grain

(D) oospore 

148. Filliform apparatus is the characteristic of 

(A) synergids 

(B) egg 

(C) anther wall

(D) antipodal cells

149. Flower organs have evolved from modified 

(A) leaves 

(B) branches

(C) sporangia 

(D) apical meristems

150. The fertile part of stamen i

(A) anther 

(B) filament

(C) connective

(D) ovule 

151. In flowering plants unisexual male of flower is called 

(A) Pistillate 

(B) Monoecious

(C) Dioecious 

(D) Staminate

152. What would be the number of chromosomes in aleurone layer if megaspore mother cell contains 10 chromosomes?

(A) 10 

(B) 15

(C) 20 

(D) 30 

153. Sexual reproduction was first reported in plants by 

(A) Kolreuter 

(B) Camerarius

(C) Van Beneden

(D) Nawaschin

154. In which of the following hydrophily takes place? 

(A) Eichomea 

(B) Rose

(C) Hydrilla 

(D) Both B& *C

155. The endosperm in angiosperms is 

(A) haploid 

(B) diploid

(C) triploid 

(D) tetraploid 

156. At the time of entering embryo sac, the pollen tube contains 

(A) two male gametes

(B) two male nuclei

(C) four male gametes

(D) three male gametes 

157. Milky water of green tender cocoo called coconut milk is 

(A) liquid chalaza 

(B) liquid nucellus

(C) degenerated liquid free nuclear endosperm

(D) lisuid female gametophyte 

158. During seed formation in angiosperms, secondary nucleus is modified into

(A) Embryo 

(B) Endosperm

(C) Cotyledon 

(D) Seed coat 

159. In porogamy pollen tube enters into endosperm through 

(A) Chalaza 

(B) Integument

(C) Micropyle 

(D) All of above 

 160. Which in the following is diploid

(A) Egg cell 

(B) Acessory cells

(C) Secondary nucleus

(D) Antipodal cells

161. The pollination in ‘semal’ takes place by add 

(A) Bat 

(B) Birds

(C) Water 

(D) Air 

162. The nutritive innermost layer of microsporangium is called 

(A) Endothecium

(B) Intine

(C) Tapetum 

(D) Middle layer

163. Endosperm is derived from 

(A) Pollentube 

(B) Microspore

(C) Microsporophyte

(D) Macrospore

164. Anatropus ovule is 

(A) Errect.

(B) inverted 

(C) round

(D) curved

165. Pollen bags are found in 

(A) Pollen sacs

(B) Thallus

(C) Ovary 

(D) Corolla 

166. Which in the following is a false fruit

(A) Strawberry

(B) Walnut

(C) Apple 

(D) All of these

167. After fertilization, seed coats of seed develop from 

(A) embryo sack

(B) integuments

(C) ovule 

(D) chalazal region

168. One of the following essential for fertilization is 

(A) Corolla 

(B) Mature ovule

(C) Calyx 

(D) Fruit 

169. Ovule develops into 

 (A) Fruit 

(B) Flower

(C) Seed

(D) Cotyledon

170. Total number of nuclei invovled in double fertilization is 


(B) 3


(D) 5

171. Pollen grains are produced in

(A) anther 

(B) stigma

(C) filament

(D) pollen sac 

172. Meiosis in anther occurs in 

(A) endothecium cells

(B) pollens 

(C) tapetal cells

(D) spore mother cells 

173. A dithecous anther contains 

(A) 4 microsporangia

(B) 3 microsporangia

(C) 2 microsporangia

(D) 1 microsporangia

174. How many pollen mother cells will form 1000 pollen grains? 

(A) 200 

(B) 250

(C) 300 

(D) 100 

175. If there are only four sporogenous cells in an anther, the number of pollen grains will be


(B) 8

(C) 16 

(D) 12

176. Pollen grains are non-green due to 

(A) absence of plastids

(B) degeneration of plastids

(C) conversion of plastids into chromoplasts

(D) attraction of vectors 

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