This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Biology > Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Identify the albuminous seed from the following: A) Wheat. B) Bean. C) Pea. D) Ground nut. Show Answer Correct Answer: A) Wheat. 2. In some cereals such as rice and wheat, pollen grains lose viability within ..... of their release. A) 1 hour. B) 30 seconds. C) 30 hours. D) 30 minutes. Show Answer Correct Answer: D) 30 minutes. 3. In what way are flowers adapted to help angiosperms reproduce? A) The flowers store nutrients needed for the plant to grow. B) The Flowers are an important source for human food. C) The flowers help attract animals that are needed to deliver pollen. D) None of these are considerations for reproduction. Show Answer Correct Answer: C) The flowers help attract animals that are needed to deliver pollen. 4. Exine of pollen grain A) Is pectocellulosic. B) Exhibits a fascinating array of patterns and designs. C) Has micropyle. D) Is degraded by enzymes. Show Answer Correct Answer: B) Exhibits a fascinating array of patterns and designs. 5. Assertion:The pollens are preserved as fossil. Reason:Sporopollenin is the one of the most resistant organic material. A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C) If Assertion is true but Reason is false. D) If both Assertion and Reason are false. Show Answer Correct Answer: A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. 6. Which of the following has proved helpful in preserving pollen as fossils A) Oil content. B) Sporopollenin. C) Cellulosic intine. D) Pollen kit. Show Answer Correct Answer: B) Sporopollenin. 7. Pollens are usually sticky and spiky so that they can ..... A) Stay on the pollinators' body without falling off easily. B) Prevent pollinators from eating them. C) All the above. D) None of the above. Show Answer Correct Answer: A) Stay on the pollinators' body without falling off easily. 8. Which of the following is NOT a pollinator of plants? A) The wind. B) A bear. C) Birds. D) Bees. E) Other insects. Show Answer Correct Answer: B) A bear. 9. Refer to the given characteristics of some flowers:(i) Light and non-sticky pollen g rains (ii) Exserted stigmas and anthers (Ill) Large, often feathery stigmas (iv) Flowers colourless, odourless and nectarless (v) Common in grasses Above features are the characteristics of A) Zoophily. B) Anemophily. C) Hydrophily. D) Entomophily. Show Answer Correct Answer: B) Anemophily. 10. In majority of angiosperms pollen grains are released in 2 celled stage, where in rest of the angiosperms pollen grains are released in A) 4 celled stage. B) 5 celled stage. C) 3 celled stage. D) None of these. Show Answer Correct Answer: C) 3 celled stage. 11. What is the purpose of seed dispersal? A) To enhance seed color. B) To prevent germination. C) To increase seed size. D) To reduce competition for resources. Show Answer Correct Answer: D) To reduce competition for resources. 12. Functional megaspore in a flowering plant develops into A) Endosperm. B) Ovule. C) Embryo. D) Embryo-sac. Show Answer Correct Answer: A) Endosperm. 13. What does filiform apparatus do A) It guides pollen tube from the synergid to egg. B) It allows pollen tube to germinate. C) It prevents entry of pollen tube in to the synergids. D) All of the above. Show Answer Correct Answer: A) It guides pollen tube from the synergid to egg. 14. The term used for transfer of pollen grains from anthers of one plant to stigma of different plants which, during pollination, brings genetically different types of pollen grains to stigma is ; A) Cleistogamy. B) Chasmogamy. C) Geitonogamy. D) Xenogamy. Show Answer Correct Answer: D) Xenogamy. 15. Section C-True or False:Orchid seeds have no endosperm. Choose True or False. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. The stalk of anther is called: A) Connective. B) Pedicel. C) Placenta. D) Filament. Show Answer Correct Answer: D) Filament. 17. Which of these parts of a flower are NOT "female" parts? A) Stamen. B) Stigma. C) Pistil. D) Style. Show Answer Correct Answer: A) Stamen. 18. The filiform apparatus is present in A) Egg cell. B) Antipodals. C) Synergids. D) Secondary nucleus. Show Answer Correct Answer: C) Synergids. 19. In water hyacinth and water lily, pollination takes place by A) Water currents only. B) Wind and water. C) Insects and water. D) Insects or wind. Show Answer Correct Answer: D) Insects or wind. 20. Which of the following set of seeds represent all monocotyledon seeds? A) Rice, Gram, Mango. B) Maize, Rice, Wheat. C) Pea, Gram, Mango. D) Maize, Pea, Gram. Show Answer Correct Answer: B) Maize, Rice, Wheat. 21. Endosperm is completely consumed by the developing embryo in A) Pea and groundnut. B) Maize and castor. C) Castor and groundnut. D) Maize and pea. Show Answer Correct Answer: A) Pea and groundnut. 22. The male structures of the flower A) Pollination. B) Stamen. C) Pistil. D) Petals. Show Answer Correct Answer: B) Stamen. 23. Complete autogamy is present in A) Chasmogamous Flowers. B) Cleistogamous Flowers. C) All the above. D) None of the above. Show Answer Correct Answer: B) Cleistogamous Flowers. 24. SECTION B-FILL IN THE BLANKS. Fill in the blank:The nutritive tissue in anther that nourishes microspores is ..... A) Endothecium. B) Tapetum. C) Pollen sac. D) Nucellus. Show Answer Correct Answer: B) Tapetum. 25. An anther having four microsporocytes shall produce pollen grains A) 24. B) 16. C) 8. D) 12. Show Answer Correct Answer: B) 16. 26. Which of the following is not a characteristic of Anemophilous flower? A) Flowers are odourless, nectarless and colourless. B) Calyx and corolla are reduced or absent. C) Flowers are large and conspicuous. D) Pollen grains are small, smooth, non sticky and light. Show Answer Correct Answer: C) Flowers are large and conspicuous. 27. Mark the odd one out with respect to polyembryony A) Striga. B) Orobanche. C) Orange. D) None. Show Answer Correct Answer: D) None. 28. The outer layer exine is thick and made up of complex, non-biodegradable, substance called ..... A) Sporangia. B) Sporopollenin. C) Sporophyll. D) Sporoderm. Show Answer Correct Answer: B) Sporopollenin. 29. In angiosperms, microsporogenesis and megasporogenesis A) Occur in anther. B) Form gametes without further divisions. C) Occur in ovule. D) Involves meiosis. Show Answer Correct Answer: D) Involves meiosis. 30. The fibrous thickenings of endothecium are in the form of ..... bands. A) Spiral. B) Annular. C) Tangential. D) Radial. Show Answer Correct Answer: C) Tangential. 31. Double fertilisation was first discovered in 1898 by inFritillaria and Lilium. A) Focke. B) Amici. C) Nawaschin. D) Strasburger. Show Answer Correct Answer: C) Nawaschin. 32. What are the common features in gametes, spores and the gametophyte generation? A) They are all diploid. B) They are all haploid. C) They are limited to vascular plants. D) They have nothing in common. Show Answer Correct Answer: B) They are all haploid. 33. The pollination which is functionally cross pollination but genetically self pollination A) Autogamy. B) Geitonogamy. C) Xenogamy. D) Allogamy. Show Answer Correct Answer: B) Geitonogamy. 34. What is the structure that develops male gametophytes in flowering plants? A) Pistil. B) Endosperm. C) Ovule. D) Microsporangium. Show Answer Correct Answer: D) Microsporangium. 35. SECTION B-FILL IN THE BLANKS. Development of embryo from nucellus is called ..... A) Adventive embryony. B) Parthenogenesis. C) Somatic embryogenesis. D) Androgenesis. Show Answer Correct Answer: A) Adventive embryony. 36. What is the reproductive part of angiosperms called? A) Root. B) Stem. C) Leaf. D) Flower. Show Answer Correct Answer: D) Flower. 37. In the formation of embryo sac, only ..... megaspore (n) is developed into 8 nuclei. A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: C) 1. 38. What is the fate of male gametes after entering the embryo sac? A) One male gamete fuse with egg cell and another male gamete fuses with synergids. B) One male gamete fuse with the synergid and another male gamete fuses with egg cell. C) One male gamete fuse with antipodal cell and another male gamete fuses with the egg cell. D) One male gamete fuse with the egg cell and another male gamete fuses with the polar nuclei. Show Answer Correct Answer: D) One male gamete fuse with the egg cell and another male gamete fuses with the polar nuclei. 39. Callase enzyme which dissolved callose of pollen tetrads to separate 4 pollens is provided by: A) Middle layers. B) Pollens. C) Endothecium. D) Tapetum. Show Answer Correct Answer: D) Tapetum. 40. Removal of anther from the bud stage from a bisexual plant is called A) Artificial hybridization. B) Emasculation. C) Selfing. D) Bagging. Show Answer Correct Answer: B) Emasculation. 41. Angiosperms flower A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 42. Section D-One-word answers (convert to MCQ):Select the correct one-word term for entry of the pollen tube through the chalaza. A) Porogamy. B) Mesogamy. C) Chalazogamy. D) Cleistogamy. Show Answer Correct Answer: C) Chalazogamy. 43. Single ovule in each ovary is seen in which type of agent of pollination A) Wind. B) Water. C) Biotic. D) Bats. Show Answer Correct Answer: A) Wind. 44. A flower with both male and female reproductive parts A) Unisexual. B) Hermaphrodite or bisexual. C) Incomplete. D) Pass Interference. Show Answer Correct Answer: B) Hermaphrodite or bisexual. 45. Special type of tissue, present in synergids which escort entry of pollen tube into ovule is A) Archesporium. B) Sporogenous tissue. C) Filiform apparatus. D) Nucellus. Show Answer Correct Answer: C) Filiform apparatus. 46. Which part of the seed contains starch and acts as food reserves? A) Cotyledon. B) Radicle. C) Testa. D) Micropyle. Show Answer Correct Answer: A) Cotyledon. 47. From the statements given below choose the option that are true for a typical female gametophyte of a flowering plant.1. It is 8-nucleate and 7-celled at maturity.2. It is free nuclear during the development.3. It is situated inside the integument but outside the nucellus.4. It has an egg apparatus situated at the chalazal end. A) 1 and 4. B) 2 and 3. C) 1 and 2. D) 2 and 4. Show Answer Correct Answer: C) 1 and 2. 48. Budding in hydra A) Asexual reproduction. B) Sexual reproduction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Asexual reproduction. 49. Patterns and designs of exine of pollen grains are the characteristic features of A) Species of plant. B) Genus of plants. C) Order of plants. D) None of these. Show Answer Correct Answer: A) Species of plant. 50. How many megaspores are functional out of 4 A) 1. B) 2. C) 3. D) All 4. Show Answer Correct Answer: A) 1. 51. Which of the following statements are true for flowers?(i) Flowers are always bisexual(ii) They are the sexual reproductive organs(iii) They are produced in all groups of plants(iv) After fertilization they give rise to fruits A) (i) and (iv). B) (ii) and (iii). C) (i) and (iii). D) (ii) and (iv). Show Answer Correct Answer: D) (ii) and (iv). 52. Which of the following is incorrect about embryosac A) Embryo sac is covered by nucellus. B) Nucellus provides the nutrients to growing embryo. C) Embryo sac is covered with sporopollenin. D) Generally only one embryo sac is present in the ovule. Show Answer Correct Answer: C) Embryo sac is covered with sporopollenin. 53. From among the situations given below, choose the one that prevents both autogamy and geitonogamy A) Monoecious plant with bisexual flowers. B) Dioecious plant bearing only male or female flowers. C) Dioecious plant with bisexual flowers. D) Monoecious plant bearing unisexual flowers. Show Answer Correct Answer: B) Dioecious plant bearing only male or female flowers. 54. How many nuclei are present in the embryo sac before double fertilisation occur? A) 8. B) 2. C) 4. D) 16. Show Answer Correct Answer: A) 8. 55. Sexual reproduction involves pollen touching the stigma to fertilize an ovary A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 56. My flowers are not sweet-scented and I do not produce nectar. How am I likely dispersed by? A) By explosive action. B) By insects. C) By water. D) By wind. Show Answer Correct Answer: D) By wind. 57. Endosperm development preceds ..... development A) Nuclei. B) Pollen tube. C) Embryo. D) Micropyle. Show Answer Correct Answer: C) Embryo. 58. Which is most crucial for seed storage? A) Dehydration and dormancy. B) Endosperm and water. C) Least amount of development. D) Endosperm in large quantity. Show Answer Correct Answer: A) Dehydration and dormancy. 59. The portion of embryonal axis above the level of cotyledons is A) Radicle. B) Epicotyl. C) Hypocotyl. D) Plumule. Show Answer Correct Answer: B) Epicotyl. 60. Seeds of an orange when taken out and squeezed, show many embryos of different sizes and shapes. The reason for this is as many emryos have developed from: A) Egg cells fusing with different male gametes forming embryos. B) PEN fusing with different male gametes forming embryos. C) Nucellar cells dividing and developing into embryos. D) Synergids dividing and developing into embryos. Show Answer Correct Answer: C) Nucellar cells dividing and developing into embryos. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 1Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 2Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 3Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 4Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 5Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 7Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 8Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books