Tiêu đề REPRODUCTION IN FLOWERING PLANTS.pdf ✅

REPRODUCTION IN FLOWERING PLANTS 1. In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is__________ 2. A dicotyledonous plant bears flowers, but never produces fruits and seeds. The most probable cause for the above situation is __________ 3. The outermost and innermost wall layers of microsporangium in an anther are respectively__________ 4. Occurrence of triploid (3n) primary endosperm nucleus is a characteristic feature of __________ 5. Nonessential floral organs in a flower are__________ 6. The proximal end of the filament of a stamen is attached to the __________ 7. A typical angiosperm anther is __________ 8. Theca of anther separated by __________ 9. An anther is consisting of __________ 10. Flowers are __________ 11. In angiosperms, the site of sexual reproduction is__________ 12. Flower is a highly modified and condensed reproductive shoot specially meant for__________ 13. Male and female reproductive structures of the angiosperms are __________ 14. Science of cultivation, breeding, marketing, and arrangement of flowers is called __________ 15. The fate of the male gametes discharged in the synergid is __________ 16. Helpful in preserving pollen as fossils has proved__________ 17. During microsporogenesis, meiosis occurs in__________ 18. In _____ plants an ovary contains one ovule__________ 19. Winged pollen grains are present in __________ 20. Perisperm differs from endosperm in__________ 21. The ovule of an angiosperm is technically equivalent to __________ 22. Most common type of embryo sac in angiosperms is __________ 23. In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be __________ 24. Preserving pollen as fossils has proved helpful in__________ 25. Poloidy of endothecium, microspore mother cell, tapetum and microspore is respectively__________ 26. Both, autogamy and geitonogamy are prevented in__________ 27. ............ many haploid nuclei are present in a mature pollen grain __________
28. The stamens represent __________ 29. Anther is generally __________ 30. The anther wall consists of four wall layers where middle layer lie between__________ 31. Transportation of nutrients to inner side of anther correct function of __________ 32. ............... of the pollen grain divides to form two male gametes __________ 33. Cells that are found in a pollen grain when it is shed at 3-celled stage are__________ 34. In a fully developed male gametophyte of flowering plants the number of nuclei is __________ 35. Mature ovules are classified on the basis of funiculus. If micropyle lie close to the funiculus, the ovule is termed as __________ 36. The function of filiform apparatus in an angiospermic embryo sac is__________ 37. Male and female flowers are present on different plants (dioecious) to ensure Xenogamy, in __________ 38. The female gametophyte of a typical dicot at the time of fertilisation is __________ 39. Typical embryo sac is __________ 40. In angiosperms, various stages of reductional division can best be studied in __________ 41. Tapetum is found in __________ 42. The first cell of male gametophyte in flowering plant __________ 43. The pollen tube usually enters the embryo sac through __________ 44. Dioecious plant bearing only male or female flowers__________ 45. The portion of the embryonal axis above the level of attachement of scutellum is __________ 46. Persistent nucellus is called as perisperm and is found in_______________ 47. The innermost layer of anther is tapetum, the function is __________ 48. ______ microspore mother cell will give rise to 256 microspores after reduction division __________ 49. Structure of ovule takes part in storage of food__________ 50. Non endospermic seeds present in __________ 51. Pericarp develops from __________ 52. The endosperms found in angiospermic seed is different from that of gymnosperm in the sense that, in the former __________ 53. Generally _____ megaspores take part in the development of female gametophyte of angiosperms__________ 54. In angiosperms, triple fusion is necessary for the formation of __________ 55. _____ is without exception in angiosperms__________ 56. The endosperm in angiosperms is formed__________ 57. In angiosperms, free nuclear division occurs during__________
58. Polar nuclei are situated in the central cell__________ 59. Proteinaceous endosperm of maize is called__________ 60. Dicot embryo consists of __________ 61. If the number of chromosome in endosperm of a dicot plant is 36, the root cell will contain__________ 62. In angiosperm endosperms is formed by__________ 63. Aleurone layer in maize is present towards__________ 64. In a seed of maize, scutellum is considered as cotyledon because it __________ 65. Function of embryonal suspensor in angiosperms is to __________ 66. In plants, in nature, autogamy is avoided since the seeds produced __________ 67. Each cell of the ___ of angiospermic microsporangia is capable of giving rise to a microspore tetrad__________ 68. Egg apparatus of angiosperm consists of__________ 69. Stalk with _____ ovules remain attached to placenta__________ 70. Continuous self pollination in a species develops__________ 71. Perisperm is __________ 72. Generally number of integuments in the ovule of angiosperm and gymnosperm is __________ 73. The functional megaspore undergoes 3 mitotic division to form __________ 74. The microsporangia develop further and become__________ 75. A microsporangium is surrounded by _____ wall layers.__________ 76. The outer three layers of anther wall perform the function of __________ 77. The diameter of pollen grains is __________ 78. Endothecium layer of anther lobes is present__________ 79. Partially developed male gametophyte is __________ 80. Germpore is the region where the exine is __________ 81. Middle layers of microsporangia are present between__________ 82. One sporogenous cell produce ........ number of microspore tetrad __________ 83. Pollen grain is considered as __________ 84. A tapetum has __________ 85. When the anther is young, a group of compactly arranged homogenous cell called the__________ 86. Male gamete in angiosperms are formed by the division of __________ 87. Intine layer is made up of __________ 88. In 60% angiosperm, pollen grains are shed at__________ 89. Embryo sac represents __________
90. Plant can loose viability in 30 min is__________ 91. Arising from placenta are the megasporangia commonly called __________ 92. One ovule in an ovary is found in__________ 93. More than one ovule in an ovary is found in__________ 94. Point where ovules are attached to placenta is __________ 95. Each ovule is covered by a protective covering called integuments which surround the nucellus. At the tip, the integuments are absent leaving a small opening called the __________ 96. Food is reserve in __________ 97. The method of embryo sac forming from a single megaspore is called __________ 98. 3 cells are grouped at micropylar end are__________ 99. The theca of anthers are separated by__________ 100. Moth deposit its egg in the part of Yucca plants__________ 101. In unisexual flowers, there is__________ 102. Syncytium is seen in __________ 103. ................ pollen mother cells should undergo meiotic division to produce 64 pollen grains __________ 104. The mature male gametophyte in angiosperm is represented by __________ 105. The type of division takes place when PMC forms microspores__________ 106. ................ percentage of angiosperms the male gametophyte is shed at 3- celled stage __________ 107. The egg apparatus of angiosperm comprises__________ 108. Importance of MMC undergoing reductional division __________ 109. Megasporangium along with its protective integument is called __________ 110. The innermost wall layer of pollen sac is tapetum. Its function is to provide __________ 111. The point of attachment of funicle with the body of the ovule is __________ 112. Genotypically, the pollen grains produced by an anther belong to __________ 113. In angiosperm, two non-motile male gametes are produced by __________ 114. Transfer of pollen grains from the anther to the stigma of another flower of same plant is called__________ 115. ............... nucleus of embryo sac are surrounded by cell wall __________ 116. Pollination occurring in closed flowers is__________ 117. Common pansy known as __________ 118. Chasmogamy refers to the condition where__________ 119. In angiosperms, a mature male gametophyte is formed from a pollen mother cell through__________