NCERT CLASS 12 | TOPIC : SEXUAL REPRODUCTION IN FLOWERING PLANTS | QB-2 | NEET BIOLOGY ONLINE TEST ~ Kalvisolai Online Test

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

NCERT CLASS 12 | TOPIC : SEXUAL REPRODUCTION IN FLOWERING PLANTS | QB-2 | NEET BIOLOGY ONLINE TEST

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

1 ➤ 101. The below figure represents

(a) Anther (b) Typical stamen (c) Pollen grain (d) Microsporangium

2 ➤ 102. Pollination in plants is referred to as

(a) Fusion of male and female gametes. (b) Transfer of pollen grain to stigma of pistil. (c) Germination of pollen of stigma. (d) Production of pollen grew inside the microsporangium.

3 ➤ 103. Autogamy refers to

(a) Transfer of pollen grain to stigma of another flower (b) Transfer of pollen grain to stigma of same flower (c) Both (a) and (B) (d) None of these

4 ➤ 104. What is observed in a normal flower which opens and exposes the stigma and anther?

(a) Autogamy is absent (b) Complete autogamy is rare (c) Always autogamous (d) Always xenogamous

5 ➤ 105. Plants which produce two types of flowers are

(a) Viola (b) Oxalis (c) Commeli (d) All of these

6 ➤ 106. The two types of flowers found in autogamous plant is

(a) Flower similar to flowers of other species with exposed anthers and stigma. (b) Flowers which do not open at all. (c) Both (a) and (b) (d) Flowers with only stigma and no anther.

7 ➤ 107. ________ flowers produce assured seed set even in the absence of pollinators

(a) Cleistogamous flower (b) Chasmogamous flowers (c) Both (a) and (b) (d) Flowers showing geitonogamy

8 ➤ 108. A type of cross pollination involving a pollinating agent is genetically similar to autogamy since pollen grain come from same plant, it is called

(a) Xenogamy (b) Geitonogamy (c) Autogamy (d) All of these

9 ➤ 109. What are the parts A, B, C, D and E in the below figure?

(a) A: Tapetum, B: Middle layers, C: Microspore mother cells, D: Endothecium, E: Epidermis (b) A: Middle layers, B: Endothecium, C: Tapetum, D: Epidermis, E: Microspore mother cell (c) A: Endothecium, B: Epidermis, C: Tapetum, D: Endothecium, E: Microspore mother cell (d) A: Epidermis, B: Endothecium, C: Middle layers, D: Microspore mother cells, E: Tapetum

10 ➤ 110. The only type of pollination during which pollination brings genetically different types of pollen grains to stigma

(a) Xenogamy (b) Geitonogamy (c) Autogamy (d) All of these

11 ➤ 111. Majority of plants uses which types of pollinating agents?

(a) Biotic (b) Abiotic (c) Both (a) and (b) (d) None of these

12 ➤ 112. What are A and B in the following figure?

(a) A: Vacuoles, B: Intine (b) A: Vacuoles, B: Nucleus (c) A: Nucleus, B: Intine (d) A: Exine, B: Intine

13 ➤ 113. ________ proportion of plants uses abiotic agents for pollination.

(a) Major (b) Most (c) Small (d) Can be small or major

14 ➤ 114. ________ factor is responsible for the contact of pollen with stigma in wind and water pollinated plants.

(a) Luck (b) Chance (c) Time (d) Temperature

15 ➤ 115. Enormous amount of pollens are produced in wind and water pollinated plants

(a) To compensate for uncertainties for contact of pollen with stigma. (b) To compensate for loss of pollen grains. (c) To ensure pollination for large number of ovules present. (d) Both (a) and (b)

16 ➤ 116. Most of the common abiotic pollinating agent for plant is

(a) Anemophily (b) Hydrophily (c) Pollination by bees (d) Pollination by ants

17 ➤ 117. Light and non-sticky pollen grains are favourable for

(a) Water pollinated plant (b) Wind pollinated plant (c) Plants with fatherly sigma (d) Both (a) and (c)

18 ➤ 118. Which of the following are true for wind pollinated plants? (A) Well exposed statements (B) Large and often feathery stigma (C) Single ovule in each ovary (D) Large number of flower packed into an inflorosence

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

19 ➤ 119. Wind pollinated flowers have

(a) Single ovule in one ovary (b) More than one ovule in ovary (c) Been packed into an inflorosence (d) Both (a) and (c)

20 ➤ 120. The tassels of corn cob are

(a) Stigma and style (b) Meant to trap pollen grains in wind (c) Both (a) and (b) (d) All are incorrect

21 ➤ 121. Wind pollination is commonly found in

(a) Large trees (b) Shrubs (c) Grasses (d) All of these

22 ➤ 122. Identify A to G in this figure.

(a) A: Plumule, B: Endosperm, C: Pericarp, D: Radicle, E: Coleorhiza, F: Scutellum, G: Coleoptile (b) A: Coleorhiza, B: Radicle, C: Endosperm, D: Pericarp, E: Plumule, F: Coleoptile, G: Scutellum (c) A: Pericarp, B: Scutellum, C: Endosperm, D: Coleoptile, E: Plumule, F: Coleorhiza, G: Radicle (d) A: Pericarp, B: Endosperm, C: Scutellum, D: Coleoptile, E: Plumule, F: Radicle, G: Coleorhiza

23 ➤ 123. Pollination by water is

(a) Rare in flowering plants (b) Limited to about 30 genera (c) Most of the genera are monocotyledons (d) All the above

24 ➤ 124. Water is the main medium of transport for male gametes of

(a) Algae (b) Bryophytes (c) Pteridophyte (d) All of these

25 ➤ 125. The distribution of pteridophytes and bryophytes is limited to some geographical zones only

(a) Because their spores can germinate in only specific kind of soil only. (b) Because they require water for fertilization. (c) Because they have only specific pollination which are available in narrow geographical range. (d) Only some weather conditions permit fruit formation in them.

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

(a) Pericarp (b) Scutellum (c) Carpels (d) Radicle

27 ➤ 127. Which of the following is incorrect for equate plants? (A) Vallisneria and Hydrilla are fresh water plants pollinated by wind. (B) Zostera a marine grass uses water as its pollinating agent. (C) Water hyacinth and water lily are pollinated by insects or wind. (D) Most of the aquatic plant flowers emerges out of water and are pollinated by wind or insects.

(a) Only B (b) Only A (c) Only A, B and C (d) All are incorrect

28 ➤ 128. Which one of the following is correct for aquatic plants?

(a) All aquatic plants use water for pollination. (b) Not all aquatic plants use water for pollination. (c) Vallisneria flowers are pollinated by water under the water surface. (d) All the above

29 ➤ 129. Which one of the following is correct for Vallisneria? (A) It grows in fresh water. (B) Female flowers or pollen grains reach the surface by long stalk. (C) Male flowers are released on to the surface of water. (D) Pollen grains are carried passively by water currents.

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

30 ➤ 130. In water pollinated species (A) Pollen grains are long and ribbon like (B) All pollen grains are protected from getting wet (C) Flowers are not very colourful (D) They do not produce nectar

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

31 ➤ 131. Identify A and B in this figure.

(a) A: Polar nuclei, B: Male gametes (b) A: Female gametes, B: Polar nuclei (c) A: Synergid, B: Egg cell (d) A: Male gametes, B: Synergid

32 ➤ 132. Amongst the pollinating agent which one is the most dominant?

(a) Butterflies and flies (b) Bees (c) Beetles and wasps (d) Moths and birds

33 ➤ 133. Which of the following is correct in reference to animal pollinated plants?

(a) Butterflies, flies, beetles, wasps, ants, moths and bats are common pollinating agents. (b) Rodents, lizards and primates are also pollinators in some species. (c) Animal pollinated plants are specifically adapted for particular species. (d) All the above

34 ➤ 134. What are the parts A, B, C, D and E in this figure?

(a) A: Egg cell, B: Synergid, C: Antipodal, D: Polar nuclei, E: Pollen tube (b) A: Pollen tube, B: Antipodal, C: Polar nuclei, D: Egg cell, E: Synergid (c) A: Pollen tube, B: Egg cell, C: Polar nuclei, D: Antipodal, E: Synergid (d) A: Synergid, B: Pollen tube, C: Egg cell, D: Antipodal, E: Polar nuclei

35 ➤ 135. Insect pollinated plants are

(a) Large and colourful (b) Fragrant (c) Rich in nectar (d) All of these

36 ➤ 136. The foul odour secreted by flowers are pollinated by

(a) Flies and beetles (b) Wasps and ants (c) Birds (d) None of these

37 ➤ 137. The reward produced by plants to their animal visitors is in the form of

(a) Nectar (b) Pollen grain (c) Both (a) and (b) (d) None of these

38 ➤ 138. Which one of the following is correct for animal pollinated plants?

(a) Nectar and pollen grains are usual floral rewards. (b) To harvest the rewards from the flower, animal come in contact with anther and stigma. (c) Animal carrying pollen when come in contact with stigma, it brings about pollination. (d) All the above

39 ➤ 139. Amorphophallus provide floral rewards in the form of

(a) Providing safe place to lay eggs (b) Tallest flower (c) Both (a) and (b) (d) None of these

40 ➤ 140. Which of the following is correct for the relationship existence between moth and yucca plant?

(a) Moth and the plant cannot complete their life cycle without each other. (b) Moth deposits egg in the locule of the ovary and the flower and in turn flower gets pollinated by the moth. (c) Larva of the moth comes out of the eggs as the seeds start developing. (d) All the above

41 ➤ 141. What indicates A, B, C and D in the below figure?

(a) A: Radicle, B: Plumule, C: Cotyledon, D: Suspensor (b) A: Plumule, B: Suspensor, C: Radicle, D: Cotyledon (c) A: Suspensor, B: Radicle, C: Plumule, D: Cotyledon (d) A: Cotyledon, B: Suspensor, C: Cotyledon, D: Radicle

42 ➤ 142. Seed is

(a) Fertilized ovule (b) Fertilized endosperm (c) Modification of integument (d) Formed from pericarp

43 ➤ 143. Typical seed consists of

(a) Seed coat (b) Cotyledon (c) Embryo axis (d) All of these

44 ➤ 144. All are examples of albuminous seeds except

(a) Wheat (b) Sunflower (c) Castor (d) Groundnut

45 ➤ 145. The following figure represents

(a) Globular embryo (b) Heart-shaped embryo (c) Zygote (d) Syngamy

46 ➤ 146. Persistent nucleus perisperm is found in

(a) Wheat and maize (b) Pea + ground nut (c) Barley and castor (d) Black paper + bect

47 ➤ 147. Wheat is the ploidy of perisperm

(a) n (b) 2n (c) 3n (d) 4n

48 ➤ 148. Select the total number of albuminous seed from the following. Pea, Groundnut, Wheat, Maize, Barely, Castor, Sunflower

(a) 4 (b) 5 (c) 2 (d) 6

49 ➤ 149. Mature seed contains how much moisture generally?

(a) 10–15% by mass (b) 5–10% by mass (c) 25–30% by mass (d) 40% by mass

50 ➤ 150. Select the false statement from the following.

(a) Persistent nucleus is the perisperm. (b) Integuments of ovule harden as though protective seed coat. (c) Micropyle remains as a small pore in seed coat and facilitates the entry of oxygen and water into seed during germination. (d) General metabolic activity of embryo is high.

51 ➤ 151. The favourable conditions available for germination are

(a) Adequate moisture (b) Oxygen (c) Suitable temperature (d) All of these

52 ➤ 152. Example of false fruit

(a) Apple (b) Strawberry (c) Cashew (d) All of these

53 ➤ 153. Thalamus takes part in fruit formation in

(a) Guava (b) Orange (c) Strawberry (d) Mango

54 ➤ 154. Identify the parts A, B, C and D in this figure.

(a) A: Seed coat, B: Endosperm, C: Cotyledon, D: Hypocotyl root axis (b) A: Cotyledon, B: Seed coat, C: Hypocotyl root axis, D: Endosperm (c) A: Endosperm, B: Cotyledon, C: Seed coat, D: Hypocotyl root axis (d) A: Hypocotyl root axis, B: Endosperm, C: Seed coat, D: Cotyledon

55 ➤ 155. Which of the following is an example of dry fruit?

(a) Groundnut (b) Mustard (c) Both (a) and (b) (d) Mango

56 ➤ 156. Fruit develops from

(a) Sepals (b) Petals (c) Thalamus (d) Ovary

57 ➤ 157. Fruit developed without fertilization is known as

(a) Parthenocarpy (b) Amphimixis (c) Apomixis (d) Polyembryony

58 ➤ 158. Which is true about parthenocarpic fruit?

(a) Seedless (b) Banana is an example (c) Can be induced by growth hormones (d) All of these

59 ➤ 159. Select the false statement.

(a) Hard seed coat provides protection to young embryo. (b) Generally seed is the product of sexual reproduction, so they generate new genetic combination leading to variation. (c) Seeds have better adaptive strategies for dispersal to new habitat and help the species to colonize in other areas. (d) Pollination and fertilization in angiosperm depend on water.

60 ➤ 160. Which oldest seed is excavated from Arctic Tundra?

(a) Lupin arcticus (b) Phoenix dactylitera (c) Solanum nigrum (d) Raphanus sativus

61 ➤ 161. Phoenix dactylifera is

(a) A 2000 year old viable seed (b) A type of date palm (c) Excavated from king Herod’s palace near the Dead sea (d) All the above

62 ➤ 162. Apomixis is seen in

(a) Asteraceae (b) Grasses (c) Both (a) and (b) (d) None of these

63 ➤ 163. Apomixis means

(a) Fruit without seed (b) Fruit with seed (c) Seed without fertilization (d) Fruit without fertilization

64 ➤ 164. Polyembryony is

(a) One embryo in one seed (b) More than one embryo in a seed (c) More seed in one embryo (d) Seed development without fertilization

65 ➤ 165. Polyembryony is seen in

(a) Citrus fruits (b) Coconut (c) Date palm (d) Pineapple

66 ➤ 166. Which one of the following is correct for yucca plant?

(a) Moth species and yucca plant cannot complete their life cycles without each other. (b) The moth deposits in egg in the locule of ovary of yucca plant. (c) The larva of the moth came out of the eggs as the seed starts developing of yucca (d) All the above

67 ➤ 167. The devices developed by plants to discourage self-pollination include (A) In some species, the pollen release and receptive stigma are not synchronized. (B) In some species, the anther and stigma are placed at different positions, so they do not come in contact. (C) Self-incompatibility

(a) All are correct (b) A and B only (c) A only (d) B only

68 ➤ 168. Dioecy is the mechanism for some plants to

(a) Promote autogamy (b) Promote self-fertilization (c) Promote cross pollination (d) All are incorrect

69 ➤ 169. In Castor and maize plant, flowers are

(a) Unisexual (b) Both male and female flowers on same plants (monoecious) (c) Both male and female flowers on different plants (d) All are incorrect

70 ➤ 170. Autogamy and geitonogamy is absent in

(a) Papaya (b) Maize (c) Castor (d) All are correct

71 ➤ 171. The pollen pistil interaction refers to

(a) Pistil’s ability to recognize the pollen (b) Acceptance of pollen to promote post-pollination events (c) Both are incorrect (d) Both (a) and (b) are correct

72 ➤ 172. The acceptance and rejection by continuous dialogue between pollen grain and pistil mediated by chemical components of pollen and pistil result in

(a) Autogamy (b) Pollen pistil interaction (c) Geitonogamy (d) Pollination

73 ➤ 173. During pollen pistil the interaction chemical components are released from

(a) Only pollen (b) Only pistil (c) Both pollen and pistil (d) The ovary

74 ➤ 174. What happens when the pollen falls on the stigma?

(a) Pollination (b) Reject of pollen (c) Only the compatible pollen germinates (d) Autogamy

75 ➤ 175. The pore from which the pollen tube germinates

(a) Seed pore (b) Germ pore (c) Intine (d) Exine

76 ➤ 176. Which way of pollen to ovary is sequentially correct?

(a) Ovary → Style → Stigma (b) Style → Stigma → Ovary (c) Stigma → Ovary → Style (d) Stigma → Style → Ovary

77 ➤ 177. What indicates ‘A’ in the above figure?

(a) Cotyledon (b) Hypocotyl root axis (c) Seed coat (d) Endosperm

78 ➤ 178. What indicates ‘C’ in the above figure?

(a) Shoot apical meristem (b) Root tip (c) Cotyledon (d) Seed coat

79 ➤ 179. What indicates ‘F’ in the above figure?

(a) Root tip (b) Shoot apical meristem (c) Cotyledon (d) Endosperm

80 ➤ 180. What indicates ‘D’ in the above figure?

(a) Seed coat (b) Cotyledon (c) Shoot apical meristem (d) Hypocotyl root axis

81 ➤ 181. During pollination in plants which shed pollens in 2-celled stage, the cells are called as

(a) Two vegetative cell (b) Two generative cell (c) Both are correct (d) One vegetative and one generative cell

82 ➤ 182. Generative cell in pollen tube divides and forms

(a) One male gamete (b) Two male gamete (c) Three male gamete (d) Four male gamete

83 ➤ 183. The plants in which pollen are shed in 3-celled stage contain?

(a) Two male gametes only (b) A large vegetative cell only (c) Both (a) and (b) (d) None of these

84 ➤ 184. What indicates ‘A’ in the following figure?

(a) Micropyle (b) Cotyledon (c) Endosperm (d) Scutellum

85 ➤ 185. The pollen tube after reaching the ovary enters inside the ovule generally through which part of ovule?

(a) Chalazal end (b) Micropyle end (c) Any of these (d) Integument of ovule

86 ➤ 186. The pollen enters one of the synergids through

(a) Micropyles end (b) Filiform apparatus (c) Integument (d) Both (a) and (b)

87 ➤ 187. The knowledge of pollen pistil interaction is helpful to plant breeders in which manner?

(a) Manipulating pollen-pistil interaction (b) To get desired hybrids in incompatible pollination (c) None of them (d) Both (a) and (b) are correct

88 ➤ 188. Which one of the following is correct for artificial hybridization? (A) Combine desirable characters to produce superior varieties. (B) Approach towards crop improvement programme. (C) Desired pollen grains are used for pollination. (D) Stigma is exposed to receive pollen.

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

89 ➤ 189. Artificial hybridization is achieved by

(a) Emasculation (b) Bagging (c) Both are required (d) None of these

90 ➤ 190. Emasculation is

(a) Removal of anther from unisexual flowering using a pair of forceps. (b) Removal of anther from flower bud after its dehisces using a pair of forceps. (c) Removal of anther from bisexual flower bud before its dehisces using a pair of forceps. (d) All the above

91 ➤ 191. Emasculated flowers are covered with a bag of suitable size; the process is referred to as

(a) Emasculation (b) Bagging (c) Both (a) and (b) (d) None of these

92 ➤ 192. Why bagging is done in an emasculated flower?

(a) To prevent contamination of its stigma with unwanted pollen. (b) To pollinate the stigma with required anthers only. (c) Both (a) and (b) (d) None of these

93 ➤ 193. Emasculation is not required in flowers with

(a) Only having pistil (unisexual) (b) Having both pistil and anthers (bisexual) (c) Having only anthers (unisexual) (d) All are correct

94 ➤ 194. The female parent plants produce unisexual flowers

(a) Do not require emasculation (b) Requires emasculation (c) The flowers are bagged during bud stage (d) Both (a) and (c)

95 ➤ 195. During syngamy

(a) Male gamete fuses with two polar nuclear (b) Male gamete fuses with egg cell (c) Both (a) and (b) (d) None of these

96 ➤ 196. Primary endosperm nucleus is a result of

(a) Fusion of two polar nuclei with male gamete (b) Fusion of egg cell with male gamete (c) Both (a) and (b) (d) None of these

97 ➤ 197. Triple fusion is a result of

(a) Fusion of three haploid nuclei (b) Fusion of two polar nuclei with male gamete (c) Both (a) and (b) (d) None of these

98 ➤ 198. Double fertilization is (A) Unique to flowering plant (B) Results in formation of zygote and primary endosperm cell. (C) A process in which triple fusion and syngamy takes place. (D) A process in which triple fusion only takes place.

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

99 ➤ 199. Triple fusion results in while syngamy results in .

(a) Zygote and endosperm (b) Endosperm and zygote (c) Both form of zygote (d) Both fern endosperm

100 ➤ 200. Identify A and B in this figure.

(a) A: Ovary, B: Syncarpous ovary (b) A: Filament, B: Ovary (c) A: Stigma, B: Filament (d) A: Syncarpous ovary, B: Stigma

Your Score is