MCQ on Sexual Reproduction in Flowering Plants | Exam Questions on Pollination
1. Dichogamy that favours cross – pollination is a type of floral mechanism in which
( a ) anthers and stigma are placed at different levels
( b ) stamens and stigma mature at different times
( c ) structure of anther and stigma acts as barrier
( d ) pollen is unable to germinate on its own stigma
Ans. b
2. Pollen grains of a flower fall on the stigma of another flowers of same plant . The phenomenon is
( a ) genetically autogamy and ecologically allogamy
( b ) genetically autogamy
( c ) ecologically allogamy
( d ) genetically allogamy and ecologically autogamy
Ans. a
3. Cross – pollination offers certain Advantages as well as disadvantages of plants . Which one of the following statements is not true about cross – pollination ?
( a ) It can fail to take place due to distance barrier
( b ) It is less economic because plants have to produce large number of pollen grains
( c ) It often gives high yield of crop
( d ) It takes place only in monoecious flowers
Ans. d
4. Occurrence of a fence or barrier between anthers and stigma of a flower is called
( a ) dichogamy
( b ) cleistogamy
( c ) herkogamy
( d ) heterostyly
Ans. c
5. What is the condition called in which a pollen of a flower falls on the stigma of another flower of the same plant ?
( a ) Ecologically cross – pollination
( b ) Genetically and ecologically cross – pollination
( c ) Genetically self – pollination and ecologically cross – pollination
( d ) None of the above
Ans. c
6. Some flowers are usually closed . It is seen in
( a ) homogamy
( b ) cleistogamy
( c ) protogamy
( d ) allogamy
Ans. b
7. For the process of pollination , pollen grain must
( a ) mature and has three nuclei
( b ) land on stigma
( c ) release its sperm nuclei
( d ) release its sperm
Ans. a
8. Hydrophily is an excellent demonstrative property of
( a ) Eichhornia
( b ) Nymphaea
( c ) Vallisneria
( d ) Nelumbium
Ans. c
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9. Cleistogamy is commonly seen in
( a ) Ficus
( b ) Commelina
( c ) Anthocephalus
( d ) Vallisneria
Ans. b
10. The Yucca flower is pollinated by
( a ) butterfly
( b ) moth
( c ) honey bee
( d ) bumble bee
Ans. b
11. Pollination in the sausages occurs by
( a ) bats
( b ) birds
( c ) insects
( d ) wind
Ans. a
12. Cleistogamous flowers
( a ) never open
( b ) open in day
( c ) always open
( d ) few open and some remain closed
Ans. a
13. Chalazogamy is the common features of
( a ) Casuarina
( b ) Betula
( c ) Both ( a ) and ( b )
( d ) Cucurbita
Ans. c
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14. Pollination in Salvia occurs through the agency of
( a ) insects
( b ) bats ( c ) ants
( d ) snails
Ans. a
15. Insect – pollinated flowers have
( a ) brightly coloured pollen
( b ) dry pollens with smooth surface
( c ) sticky pollen with rough surface
( d ) large quantities of pollen
Ans. c
16. Which of the following can prevent the self – pollination ?
( a ) Herkogamy
( b ) Dichogamy
( c ) Self – sterility
( d ) All of these
Ans. d
17. Flower pollinated by humming birds is
( a ) Bignonia
( b ) Peepal
( c ) Magnolia
( d ) Bougainvillea
Ans. a
18. ……… is / are favoured by heterostyly in Primula .
( a ) Autogamy
( b ) Allogamy
( c ) Homogamy
( d ) All of these
Ans. b
19. Pollination which can occur in the same plants is
( a ) dichogamy
( b ) dicliny
( c ) cleistogamy
( d ) herkogamy
Ans. c
20. Plants pollinated by moths possess
( a ) strong scents
( b ) long corolla tube
( c ) nectaries
( d ) All of these
Ans. d
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21. The cross – pollinated flowers are
( a ) brightly coloured
( b ) small ‘
( c ) scented
( d ) Both ( a ) and ( c )
Ans. d
22. Pollen of anemophilous plants are
( a ) large and heavy
( b ) small and sticky
( c ) small , dry and unwettable
( d ) large , light and hygroscopic
Ans. c
23. Self – pollination in potato is performed in
( a ) bud condition
( b ) cleistogamous condition
( c ) bending of filaments to bring anthers in contact with stigma
( d ) when style bends to bring stigma in contact with anthers .
Ans. d
24. Pollination in Vallisneria is
( a ) hydrophilous
( b ) cleistogamous
( c ) anemophilous
( d ) entomophilous
Ans. a
25. Maize is
( a ) cleistogamous
( b ) anemophilous
( c ) entomophilous
( d ) hydrophilous
Ans. b
26. In custard apple ,
( a ) self pollination is highly likely
( b ) the flowers are dioecious
( c ) anthers and stamens may mature at different times
( d ) All of the above
Ans. c
27. Distance between the stigma and anthers in the same flower
( a ) reduces the chances of self pollination
( b ) enhances the chances of self pollination
( c ) reduces the chances of cross pollination
( d ) enhances the chances of cross pollination
Ans. a
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28. In the angiosperm life cycle which of the following is not a member of the sporophyte generation ?
( a ) Carpel
( b ) Anther
( c ) Pollen
( d ) Ovary
Ans. c
29. A plant that flowers in its second year of growth and then dies is
( a ) a biennial
( b ) a semi – annual
( c ) an annual
( d ) a perennial
Ans. a
30. Which of the following flowering arrangements promotes self – pollination ?
( a ) Monoecious
( b ) Dioecious
( c ) Dichogamous
( d ) None of these
Ans. d
31. Early seed plants were pollinated by
( a ) wind
( b ) bees
( c ) birds
( d ) butterflies
Ans. a
32. A number of megaspores degenerate after being produced by the meiosis of the megaspore mother cell . That number is
( a ) 2
( b ) 3
( c ) 1
( d ) 4
Ans. b
33. A trend in floral evolution is
( a ) bilateral symmetry
( b ) lateral symmetry
( c ) spiral symmetry
( d ) radial symmetry
Ans. a
34. Which of the following is not part of the innermost whor of the flower ?
( a ) Stamen
( b ) Style
( c ) Pistil
( d ) Ovary
Ans. b
35. Self – pollination can occur in which of the following :
( a ) Dioecious plants
( b ) Dichogamous plants
( c ) Pistillate plants
( d ) None of these
Ans. d
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36. Which of the following is not an annual plant ?
( a ) Cabbage
( b ) Corn
( c ) Sunflower
( d ) Wheat
Ans. a
37. If a flower is to be pollinated by birds , it should be
( a ) blue
( b ) white
( c ) yellow
( d ) red
Ans. d
38. Pollination is characteristic of
( a ) gymnosperms
( b ) fungi
( c ) angiosperms
( d ) pteridophytes
Ans. v
39. Wind pollinated plants differ from insect pollinated plants in having
( a ) small petals and sticky pollen
( b ) small coloured petals and heavy pollen
( c ) coloured petal and large pollens
( d ) no petals and light pollen
Ans. d
40. A typical example of self pollination is
( a ) rice
( b ) wheat
( c ) maize
( d ) cotton
Ans. c
41. Deposition of pollen on the stigma of another flower of the same plant is
( a ) homogamy
( b ) dichogamy
( c ) xenogamy
( d ) geitonogamy
Ans. d
42. Pollen grain of flowers pollinated by insects or wind are
( a ) large and showy
( b ) rough and sticky
( c ) rough and smooth
( d ) rough and dry
Ans. b
43. Pollination by bats is called ?
( a ) Ornithophily
( b ) Entomophily
( c ) Malacophily
( d ) Cheiropterophily
Ans. d
44. Insect pollinated flowers usually possess
( a ) dry pollens with smooth surface
( b ) sticky pollens with rough surface
( c ) large quantities of pollen
( d ) brightly coloured pollens
Ans. b
45. If a pollen of a flower falls on the stigma of another flower belonging to the same plant it is
( a ) genetically self pollination and ecologically cross pollination
( b ) ecologically cross pollination
( c ) genetically and ecologically cross pollination
( d ) None of the above
Ans. d
