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Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 12 (60 MCQs)

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1. When the anther is young, a group of compactly arranged homogenous cells called the ..... tissue occupies the centre of each microsporangium.
2. The world's oldest viable seed, excavated from Arctic Tundra is of
3. Insects can lay their eggs safely in which of the following plant?
4. A plant is one that has male and female flowers on the same plant, or that has flowers on every plant that contain both male and female reproductive components.
5. Nucellar polyembryony is reported in
6. The first division in a pollen grain results in formation of-
7. Match column I with column II and select the correct optionfrom the given codes, ColumnI Column II A. Anemophily (i) Grasses, Date palmB. Hydrophily (ii) Rose, JasmineC, Entomophily (iii) Butea, BignoniaD. Ornithophily (iv) Vallisneria, Ceratophyllum
8. Bees' original motive to go from flower to flower are to get to what?
9. The remains of second cotyledon occur in some grasses. It is called
10. The obturator in Euphorbia develops from
11. The tallest flower is that of .....
12. What is the role of the integument in seed development?
13. The ..... is specialized reproductive structure of a plant in which sexual reproduction takes place.
14. The innermost layer of anther is tapetum whose function is
15. Seed dormancy is broken by:
16. What is the sexual organ of a green plant?
17. Section D-One-word answers (convert to MCQ):Select the correct one-word term for the functional unit formed immediately after fertilization.
18. It is the second layer of microsporangium which helps in dehiscence and protects inner part of it.The layer is
19. Transfer of pollen grains from the anther to the stigma of another flower of different plants is called
20. The structure of bilobed anther consists of
21. SECTION B-FILL IN THE BLANKS. Entry of pollen tube through integuments is called .....
22. Section C-True or False:Endosperm is diploid in angiosperms. Choose True or False.
23. Megaspore mother cell is found near the region of
24. Ovules contain many embryo in
25. Section D-One-word answers (convert to MCQ):Select the correct one-word term for natural seedless fruit formation.
26. Fruit X is fleshy and bright-red in colour. The likely dispersal method for its seeds is by .....
27. Pollen kits is generally found in
28. Pollen grain is made up of two layers, outer ..... & inner ..... respectively
29. Callase enzymes is produce by:
30. Offspring are a blend or mix of DNA from parents
31. Coconut water is ..... endosperm
32. A complete pollen grain consists of .....
33. Gynoecium stands for which part of the angiosperm flower?
34. There are no genetic differences in the offspring
35. In the flowering plants, male and female gametes both are
36. Wind pollination requires that the pollen grains should be ..... so that they can be transported in wind currents.
37. Mark the structure which facilitates entry of oxygen and water into the seed during germination.
38. Pollination that occurs in between the different flowers of two or more different plants but belongs to the same species (Note-Not in the same plant)
39. Each microsporangium has four types of wall layers. Which one of the following is the correct combination of wall layers?
40. Cleistogamous flowers are strictly autogamous because they remain
41. Select the correct option regarding the ploidy level of different structures of an angiospermous ovule. Nucellus MMC Functional megaspore
42. The process of reproduction involving a single parent that results in offspring that are genetically identical to the parent?
43. ..... of the pollen grains divide to form two male gametes
44. Sexual Reproduction involves fusion of two .....
45. What type of flowers can produce seed-set without pollinators?
46. SECTION B-FILL IN THE BLANKS. The middle cell of embryo sac is the .....
47. Unisexuality of flowers prevents
48. Which one of the following statement is correct:
49. Example of false fruit includes
50. Organisms in the population are diverse, so some of them will have an advantage for survival if the environment changes
51. If the environment changes for an asexual offspring it might
52. In flowering plants, meiosis takes place during
53. A typical angiospermous ovule is attached to the placenta by means of a stalk called X. Body of the ovule fuses with X in the region called Y. Identify X and Y. X X Y
54. Plumule give rise to
55. Sporopollenin is present in which part of the a pollen?
56. What is the function of filiform apparatus in anangiospermic embryo sac?
57. Cells that found in a pollen grain when it is shed at 3-celled stage are
58. Which amongst the following statements best defines coleoptile?
59. The ovary consists of ovules that contain the female sex cells.
60. Which of the following seeds have remained alive for the longest period?
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