This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the devices that discourage self pollination or increase cross pollination A) Outbreeding devices. B) Inbreeding devices. C) Self breeding devices. D) None of the above. Show Answer Correct Answer: A) Outbreeding devices. 2. The yellow, powdery stuff on the stamens A) Pollen. B) Dust. C) Mites. D) Germs. Show Answer Correct Answer: A) Pollen. 3. Recent research has shown that pollination requires that carpels recognize pollen grains are "self or non self" . For self incompatibility the system requires: A) Rejection of non self cells. B) Rejection of self cells. C) Carpel incompatibility with the egg cells. D) That the flowers be incomplete. Show Answer Correct Answer: B) Rejection of self cells. 4. Persistent nucellus is called as ..... and is found in ..... A) Perisperm, black pepper. B) Perisperm, groundnut '. C) Endosperm, black pepper. D) Endosperm groundnut. Show Answer Correct Answer: A) Perisperm, black pepper. 5. Seed dispersal does not reduce competition between the seedlings and the parent plant for A) Light. B) Oxygen. C) Water. D) Nutrients. Show Answer Correct Answer: B) Oxygen. 6. Cleistogamous flowers produce assured seed-set even in the absence of pollinators. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. The pistil consists of a sticky part where pollen grains land. A) Style. B) Stigma. C) Stamen. D) Anther. Show Answer Correct Answer: B) Stigma. 8. The sporopollenin is non-degradable because A) It can withstand strong acids. B) It is resistant at very high temperature. C) No enzyme degrade it. D) All of the above. Show Answer Correct Answer: D) All of the above. 9. Entry of pollen tube into the embryo sac is under ..... guidance. A) Chemotropic. B) Chemotactic. C) Phototropic. D) Thigmotropic. Show Answer Correct Answer: A) Chemotropic. 10. Triple fusion in Capsella bursa pastoris is fusion of malegamete with A) Egg. B) Secondary nucleus. C) Synergid. D) Antipodal. Show Answer Correct Answer: C) Synergid. 11. A pollen mother cell undergoes how many divisions to form a mature gametophyte? A) 3 mitosis and 1 meiosis. B) 1 mitosis and 2 meiosis. C) 2 mitosis and 1 meiosis. D) 2 mitosis and 2 meiosis. Show Answer Correct Answer: C) 2 mitosis and 1 meiosis. 12. Main function of the tapetum is to A) Provide nutrition to developing pollen grains. B) Provide protection to anther. C) Divide and form pollen grains. D) Facilitate entry of male gametes into the embryo sac. Show Answer Correct Answer: A) Provide nutrition to developing pollen grains. 13. ..... is a genetic mechanism and prevents self-pollen from fertilising the ovules by inhibiting pollen germination of pollen tube growth in the pistil. A) Artificial hybridisation. B) Protandry. C) Protogyny. D) Self-incompatibility. Show Answer Correct Answer: D) Self-incompatibility. 14. In over what precent pollen grains are shed at 2 cell stage in angiosperms? A) 70. B) 60. C) 50. D) 30. Show Answer Correct Answer: A) 70. 15. Which of the following is NOT a part of the stamen? A) Anther. B) Filament. C) Connective. D) Stigma. Show Answer Correct Answer: D) Stigma. 16. When the pollen grain lands on the stigma and starts to grow, the first action is that A) A male nucleus fuses with the endosperm nucleus. B) A double fertilization takes place. C) The generative nucleus divides to form two male gametes. D) The zygote divides to form a row of cells. Show Answer Correct Answer: C) The generative nucleus divides to form two male gametes. 17. Feathery stigma occurs in A) Pea. B) Wheat. C) Datura. D) Caesalpinia. Show Answer Correct Answer: B) Wheat. 18. Egg apparatus is situated at A) Central cell. B) Micropylar end. C) Chalazal end. D) None of the above. Show Answer Correct Answer: B) Micropylar end. 19. Pollen viability is maximum in: A) Wheat. B) Rice. C) Date palm. D) Orchid. Show Answer Correct Answer: C) Date palm. 20. Thalamus contributes in the fruit formation in A) Apple. B) Strawberry. C) Cashewnut. D) All of these. Show Answer Correct Answer: D) All of these. 21. When micropyle, chalaza and hilum lie in a straight line, the ovule is said to be A) Anatropous. B) Orthotropous. C) Amphitropous. D) Campylotropous. Show Answer Correct Answer: B) Orthotropous. 22. Fruits that are developed without fertilization are called A) False Fruits. B) True Fruits. C) Parthenocarpic Fruits. D) Polyembryonic Fruits. Show Answer Correct Answer: C) Parthenocarpic Fruits. 23. Which of the following is incompatible pollen grain for a self incompatible species of flower? A) Pollen grain from stamen of different flower in same plant. B) Pollen grain from stamen of same flower. C) Pollen grain from stamen of different flower from different plant. D) None of the above. Show Answer Correct Answer: B) Pollen grain from stamen of same flower. 24. The process of formation of seeds without fertilization in flowering plants is known asBudding Apomixis Sporulation Somatic hybridization A) Budding. B) Apomixis. C) Sporulation. D) Somatic hybridization. Show Answer Correct Answer: B) Apomixis. 25. In angiosperms, fertilization is: A) Porogamous. B) Double. C) Single. D) Apogamous. Show Answer Correct Answer: B) Double. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 1Class 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 6Class 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 9Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 10Class 12 Biology Chapter 2 Sexual Reproduction In Flowering Plants Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books