REPRODUCTION IN FLOWERING PLANTS-NEET PRACTICE QUESTIONS

 

                                  REPRODUCTION IN FLOWERING PLANTS

1. Male gametophyte of angiosperms/monocots is:

A) Microsporangium           

B) Nucellus  

C) Microspore     

D) Stamen

Correct Answer: C

2. The male gametophyte (microgametophyte) in case of monocots is:

A) Tetrad          

B) Nucellus

C) Megaspore      

D) Microspore

Correct Answer: D

3.  In a somatic cell, there are 16 chromosomes. What will be the number of chromosomes in the pollen mother cell of the plant?

A) 16   

B) 8    

C) 24        

D) 32

Correct Answer: A

4. Function of funicle includes:

A) Support to the body

B) Supplying nutrition to the body from the palcenta

C) Both [a] and [b]

D) None of these

Correct Answer: C

5. If the haploid number in a flowering plant is 14. What shall be the number of chromosomes integuments, antipodal cells, embryo, endosperm and nucellus respectively?

A) 14, 28, 7, 42, 21

B) 7, 14, 42, 28, 14

C) 28, 14, 28, 42, 28          

D) 42, 28, 14, 28, 14

Correct Answer: C

6. As a pollen tube grows into the female organ, the nucleus that enters the synergid first is called the:

A) Sperm nucleus

B) Generative nucleus

C)Tube nucleus                 

D) Pollen nucleus

Correct Answer: C

7. Central cell of embryo sac contains:

A) A single haploid nucleus.

B) Two haploid polar nuclei.

C) One diploid fusion or secondary nucleus.

D) Either [b] or [c]

Correct Answer: D

8. Identify 1, 2, 3, 4 and 5 structures shown in figure of a female gametophyte respectively. 

A) Antipodal cells, Central cell. Polar nuclei, Synergids and Acrosome

B) Antipodal cells, Central cell, Polar nuclei, Synergids and Filiform apparatus

C) Synergids, Central cell, Polar nuclei, Antipodal cells and Filiform apparatus

D) Synergids, Megaspore mother cell, Polar nuclei, Synergids, Filiform apparatus

Correct Answer: B

9. In dicot embryo, the radicle is formed by:

A) Epibasal tier of embryo

B) Hypobasal tier of embryo

C) Hypophysis of suspensor

D) Terminal cell of suspensor

Correct Answer: C

10. Dicot embryo consists of:

A) Radicle and plumule

B) Radicle, plumule, cotyledons and sometimes endosperm

C) Radicle, plumule, cotyledons and tegmen

D) Radicle, plumule, cotyledons, tegmen and testa

Correct Answer: B

11. Generative cell was destroyed by laser but a normal pollen tube was still formed because:

A) Vegetative cell is not damaged.

B) Contents of killed generative cell stimulate pollen growth.

C) Laser beam stimulates growth of pollen tube.

D) The region of emergence of pollen tube is not harmed.

Correct Answer: A

 12. Female gametophyte of angiosperms is represented by:

A) Ovule

B) Megaspore mother cell

C) Embryo sac

D) Nucellus

Correct Answer: C

13. Angiospermic plant having chromosome number of 12. What will be chromosome number in integuments and nucellus?  

A) 4         

B)  6   

C) 12                    

D) 24

Correct Answer: C

14. The arrangement of floral whorls on the thalamus from the outermost to the innermost is:

A) Calyx, corolla, androecium and gynoecium

B) Calyx, corolla, gynoecium and androecium

C) Gynoecium, androecium, corolla and calyx

D) Androecium, gynoecium, corolla and calyx

Correct Answer: A

15. Exine of pollen is formed by activity of:

A) Tapetum    

B) Endothelium

C) Middle layers   

D) Endothecium

Correct Answer: A

16. Male gametes or sperms are developed from generative cell by:

A) Meiotic division

B) Mitotic division

C) Amitotic division            

D) none of these

Correct Answer: D

17. Wall of a pollen sac consists of:

A) Endothecium and tapetum

B) Tapetum and middle layers

C) Endothecium, middle layers and tapetum

D) Epidermis, endothecium, middle layers and tapetum

Correct Answer: D

 18. In dicots, the most common pollen tetrad is:

A) Isobilateral      

B) Tetrahedral

C) Linear           

D) Decussate

Correct Answer: B

19. Anther are:

A) Externally tetralocular

B) Internally tetralocular

C) Externally and internally tetralocular

D) Internally bilobed

Correct Answer: B

20. If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be:        

A) Haploid         

B)Triploid

C) Tetraploid       

D)Pentaploid

Correct Answer: D

21. Aleurone cells are present in endosperm of:

A) Cereals      

B) Legumes

C) Both [a] and [b]

D) None of these

Correct Answer: A

22. Multinucleate condition is present in: 

A) Quiescent centre 

B) Maize

C) Meristematic tissue

D) Liquid endosperm of coconut

Correct Answer: D

23. Match column-I with column- II and select the correct answer using the codes given below.

	Column-I		Column-II
A.	Zoophily	I.	Pollination by birds
B.	Ornithophily	II.	Pollination by insects
C.	Entomophily	III.	Pollination by bats
D.	Chiropterophily	IV.	Pollination by animals

A) A-III;     B-II;    C-I;     D-IV

B) A-I;       B-II;    C-III;   D-IV

C) A-IV;     B-I;     C-II;    D-III

D) A-IV;    B-II;    C-I;     D-III  

Correct Answer: C

24. Pea seeds are sown two feet deep in the soil. plants will be:             

A) Formed normally           

B) Not formed    

C) Weaker          

D) Healthier 

Correct Answer: B

25. Which one commonly develops haustoria in embryo sac?

A) Synergids       

B)  Antipodal cells   

C) Oosphere          

D) Central cell

Correct Answer: B

26. An apomictic seed contains an embryo that is:

A) Produced when two sperm fertilise one egg.

B) Developed from one egg alone.

C) The result of parental self - fertilisation.

D) Genetically identical to its parent.

Correct Answer: D

27. Scutellum is present in the embryo of:

A) Pea                  

B) Ranunculus

C) Triticum     

D) None of these

Correct Answer: C

28. In ovule, meiosis occurs in:

A) Archesporial cell

B) Megasporocyte

C) Megaspore      

D) Parietal cell

• Correct Answer: B

  

29. Seeds are adaptively important because:

A) They maintain dormancy.

B) They protect young plants during vulnerable stages.

C) They store food for young plants, and facilitate disperal.

D) All of the above

Correct Answer: D

30. Number of prothallial cells present in the male gametophyte of angiosperms is:

A) One                 

B) Two

C) Many   

D) Zero

Correct Answer: D

31. Growth of pollen tube is.

A) Apical        

B) Basal

C) Intercalary      

D) Diffused

Correct Answer: A

32. Tapetum present in the microsporangial wall occurs between:

A) Epidermis and endothecium

B) Endothecium and middle layers

C) Epidermis and middle layers

D) Middle layers and sporogenous tissue

Correct Answer: D

33. Pollen tube is covered by:    

A) Pectocellulose   

B) Sporopollenin

C) Cellulose        

D) Lignocellulose

Correct Answer: A

 34. Polygonum type of embryo sac/typical female gametophyte of angiosperms is:

A) 7-celled, 7-nucleate

B) 7-celled, 8-nucleate

C) 8-celled, 7-nucleate        

D) 8-celled, 8-nucleate

Correct Answer: B

35. Ovule is inverted with body fused to funicle, micropyle lying close to hilum and facing the placenta. It is:

A) Hemitropous    

B) Orthotropous

C) Anatropous

D) Campylotropous

Correct Answer: C

 36. Bamboo reproduces by:

A) Rhizomes   

B) Tubers

C) Corms              

D) Stolons

Correct Answer: A

37. When the pollen tube enters the ovule through the integuments, the phenomenon is known as:

A) Isogamy           

B) Porogamy

C) Mesogamy 

D) Chalazogamy

Correct Answer: C

38. Select the correct order of endosperm types.      

A) Cellular, helobial, free nuclear

B) Cellular, free nuclear, helobial

C) Helobial, free nuclear, cellular

D) Free nuclear, cellular, helobial

Correct Answer: C

39.  Which of the following statement(s) is/are false?

(i) Pollen grains represents immatured male gametophyte.

(ii) In angiosperms, partially developed male gametophytes are pollinated.

(iii) Generative cell is siphonogamous while vegetative cell is spermatogenous.

(iv) Formation and differentiation of pollen grains is called microsporogenesis.

(v) Pollen grains of some plants produce seve allergy and respiratory or bronchial diseases.

(vi)  Pollen grains are poor in nutrients.

A) (i) and (vi)      

B) (iii) and (vi)

C) (iv) and (v)      

D) (v) and (vi)

Correct Answer: B

40. For self pollination, flower must be:

A) Unisexual      

B) Bisexual

C) Monosexual     

D) Asexual

Correct Answer: B

41. The phenomenon of two flowers, one having long stamens and short styles, and other having short stamens and long style:

A) Allogamy          

B) Heterostyly

C) Dicliny              

D) Herkogamy

Correct Answer: B

42. Which of the following pair has haploid structures?        

A) Nucellus and antipodal cells.

B) Antipodal cells and egg cell.

C) Antipodal cells and megaspore mother cell.

D) Nucellus and primary endosperm nucleus.

Correct Answer: B

 43. In angiosperms, female gametophyte is represented by:

A) Synergids       

B) Carpel

C) Egg                  

D) Pollen grains

Correct Answer: D

 

44. Intine of pollen grain is made of:

A) Callose

B) Pecto-cellulose

C) Cellulose

D) Fat-like Sporopollenin

Correct Answer: B

45. Abundant occurrence of fossilised pollen grains is due to resistant:

A) Lignocellulose   

B) Sporopollenin

C) Pectocellulose   

D) Pectolignin

Correct Answer: A

46. apetal cells are:          

A) Haploid         

B)  Polyploid

C) Diploid          

D) Triploid

Correct Answer: B

47. Embryo sac is surrounded by a wall of:

A) Specialised nucellar cells

B) Transfer cells

C) Membrane of megaspore

D) Membrane of egg

Correct Answer: C

48. Vegetative nucleus occurs in:

A) All flowering plants

B) All seed plants

C) All vascular plants          

D) All embryophytes

Correct Answer: A

49. Cross-pollination is preferred over self pollination because:

A) It results in better offspring

B) The new varieties are formed

C) It is easy

D) Parthenogenesis can be induced

Correct Answer: A

50. Which type of association is found in between entomophilous flower and pollinating agent?

A) Mutualism  

B)  Commensalism

C) Cooperation     

D) Co-evolution

51. Unisexuality of flowers prevents:

A) Geitonogamy but not xenogamy

B) Autogamy and geitonogamy

C) Autogamy but not geitonogamy

D) Both geitonogamy and xenogamy

Correct Answer: C

52. The endosperm in angiosperm develops from:

A) Zygote

B) Secondary nucleus

C) Chalazal polar nucleus

D) Micropylar polar nucleus

Correct Answer: B

53. Given below are the different types of ovules. Identify A to F.        

A) A-Circinotropous, B-Amphitropous,  C-Campylotropous, D-Hemitropous, E-Anatropous, F-Orthotropous

B) A-Campylotropous, B-Anatropous, C-Hemitropous, D-Amphitropous, E-Circinotropous, F-Orthotropous

C) A-Orthotropous, B-Anatropous, C-Hemitropous, D-Campylotropous, E-Amphitropous, F-Circinotropous

D) A-Anatropous, B-Campylotropous, C-Hemitropous, D-Amphitropous, E-Circinotropous, F-Orthotropous

Correct Answer: C

54. Which of the following statement is true about tapetum?

A) It is the innermost layer of anther wall.

B) Cells of tapetum are large in size and ha more than one diploid nuclei or polyploidy nucleus.

C) It contributes in the formation of sporopollenin.

D) All of the above

Correct Answer: D

55. Hybrid seeds have to be produced every year because:             

A) Hybrid plants become sterile in coming years.

B) They show more heterosis in coming years

C) Hybrid vigour is not maintained beyond on generation as segregation of genes begins in the second generation.

D) Hybrid seed industry tends to increase cost of the seeds.

Correct Answer: C

 56. In a seed of maize, scutellum is considered as cotyledon because it:

A) Protects the embryo.

B)  Contains food for the embryo.

C) Absorbs food materials and supplies them to the embryo

D) Converts itself into a monocot leaf.

Correct Answer: C

57. An example of a naturally occurring parthenocarpic fruit is:

A) Guava              

B)  Mango

C) Banana      

D) Apple

Correct Answer: C

58. The largest cell in a embryo sac is:

A) Egg                  

B) Central cell

C) Synergid        

D) Antipodal cell

Correct Answer: B

59. Meiosis of megaspore mother cell generally produces:

A) Linear tetrad     

B) Tetrahedral tetrad

C) Decussate tetrad

D) Isobilateral tetrad

Correct Answer: A

60. Xenogamy is also known as:

A) Autogamy      

B) Cross pollination

C) Self-pollination  

D) Cleistogamy

Correct Answer: B

61. Wind pollinated flowers have:

A) Small petals and sticky pollen.

B) No petals and light pollen.

C) Coloured and large petals with large pollen.

D) Small petals and heavy pollen.

Correct Answer: B

62. Function of suspensor of embryo is:

A) Absorption of nourishment.

B) Push the embryo into nutritive endosperm region.

C) Formation of secondary embryos.

D) All of the above

Correct Answer: B

63. Wall of mature pollen gram consists or:

A) Ektexine and endexine

B) Tapetum and endothecium

C) Exine and inline

D)  Foot and baculate layer

Correct Answer: C

64. Which one of the following element is essential for the growth of pollen tube?

A) Ca                   

B) B   

C) Mg       

D) Mo

Correct Answer: B

 65. Isogamy is:

A) Fusion of male and female gametes.

B) Fusion of physiologically and morphologically similar gametes.

C) Entry of pollen tube through integuments.

D) None of the above

Correct Answer: B

66. The insect pollinated pollen grain, tapetum helps in the development of:

A) Sporopollenin   

B) Cellulose

C) Pectin           

D) Pollen kit

Correct Answer: D

67. At the time of anther dehiscence:

A) Middle layers develop fibrous thickenings.

B) Epidermis degenerates.

C) Endothecium develops fibrous thickenings.

D) Endothecium degenerates.

Correct Answer: C

68. The given diagram refers to a T. S. of anther. Identify 1 to 5 respectively.      

A) Sporogenous tissue, tapetum, epidermis, middle layer, endothecium.

B) Sporogenous tissue, epidermis, tapetum, middle layer, endothecium.

C) Sporogenous tissue, epidermis, middle layer, tapetum, endothecium.

D) Sporogenous tissue, tapetum, middle layer, epidermis, endothecium.

Correct Answer: A

69. Give the of name the cell division type at A, B, C and D.                     

A) A-Meiosis-I, B-Mitosis, C-Mitosis, D-Meiosis

B) A-Meiosis-I, B-Meiosis-II, C-No division, D-Mitosis

C) A-Mitosis, B-No 'division, C-Meiosis-II, D-Meiosis-I

D) A-Mitosis, B-Mitosis, C-Meiosis-I, D-Meiosis-I

Correct Answer: B

70. Apomixis is:

A) Development of plants in darkness.

B) Development of plants without fusion of gametes

C) Inability to perceive stimulus for flowering.

D) Effect of low temperature on plant growth.

Correct Answer: B

71. Which of the following floral parts forms pericarp after fertilisation?

A) Nucellus        

B) Outer integument

C) Ovary wall  

D) Inner integument

Correct Answer: C

72. Plumule is produced from the:

A) Proembryo      

B) Hypophysis

C) Apical octant    

D)  micropylar octant

Correct Answer: C

73. Flowers showing omithophily, represent few characteristics like:        

A) Blue flower with nectaries at base of corolla.

B) Red sweet scented flower with nectaries.

C) Bright red flower into thick inflorescence.

D) White flowers with fragrance.

Correct Answer: A

74. An angiospermic plant has to produce 88 viable ovules. How many meiotic divisions will be needed to produce equal number of female gametophytes by this plant?  

A) 88                    

B) 22   

C) 44        

D) 132

Correct Answer: A

75. In cross self fertilised plants, the flowers are first emasculated. Which organ of the plant is removed in this process?

A) Ovary              

B) Ovules

C) Stigmas            

D) Stamens or anthers

Correct Answer: D

76. 3-celled stage of the mature male gametophyte is reached:

A) Before pollination

B) after pollination

C) During fertilisation          

D) after fertilization

Correct Answer: B

77. Endothecium layer of anther lobes is present:

A) Outside the epidermis

B) inner to epidermis

C) In the innermost layer     

D) in the middle region

Correct Answer: B

78. How many pollen grains will be formed after meiotic division in ten microspore mother cells?

A) 10                                

B) 20   

C) 40        

D) 80

Correct Answer: C

 79. Pollination by water occurs in:

A) Ceratophyllum  

B) Zostera

C) Lemna          

D) All of these

• Correct Answer: D

80. Seed coat is derived from:

A) Pericarp

B) Epicarp

C) Integuments of ovule      

D) Nucellus

Correct Answer: C