Tiêu đề 24. Sexual Reproduction in Flowering Plants.pdf ✅

FACT/DEFINITION TYPE QUESTIONS 1. Flowers are highly modified _______. (a) Root (b) Shoot (c) Stem (d) Leaves 2. A typical flower has ______different kinds of whorl. (a) two (b) three (c) four (d) five 3. Anther is typically (a) tetrasporangiate (b) bisporangiate (c) trisporangiate (d) monosporangiate 4. The functions of tapetum is to (a) produce ubisch bodies. (b) produce pollen grains. (c) provide nourishment to the developing pollen grains. (d) store and protect pollen grains. 5. Microsporogenesis occurs (a) on margins of leaves. (b) inside the ovule. (c) inside the anther. (d) in essential floral organs. 6. Exine of pollen grain is formed of (a) callose (b) pecto-cellulose (c) ligno-cellulose (d) sporopollenin 7. One of the most resistant known biological material is. (a) lignin (b) hemicellulose (c) sporopollenin (d) lignocellulose 8. Pollen grain is liberated at (a) one celled stage. (b) two celled stage. (c) three celled stage. (d) two or three celled stage. 9. Pollen grains can be stored in liquid nitrogen at _________. (a) 70°C (b) 100°C (c) – 196°C (d) 0°C 10. Ovule is (a) megasporangium (b) megasporophyll (c) integumented megasporangium (d) rolled megasporophyll 11. Ovules are attached to a parenchymatous cushion called (a) nucellus (b) obturator (c) conducting tissue (d) placenta 12. The point at which funiculus touches the ovule is (a) chalaza (b) hilum (c) raphe (d) endothelium 13. Egg apparatus consists of (a) egg cell and antipodal cells. (b) egg cell and central cell. (c) egg cell and two synergids. (d) egg cell and one synergid. 14. The most common type of ovule is __________ . (a) orthotropous (b) hemitropous (c) anatropous (d) campylotropous 15. Filiform apparatus is found in (a) synergids (b) anther wall (c) secondary nucleus (d) egg cell 16. 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 17. Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called (a) geitonogamy (b) xenogamy (c) autogamy (d) cleistogamy 18. Cleistogamous flowers are (a) wind pollinated (b) self-pollinated (c) cross-pollinated (d) insect pollinated 19. Both chasmogamous and cleistogamous flowers are present in (a) Helianthus (b) Lommelina (c) Rosa (d) Gossypium 20. Pollination by water occurs in (a) Vallisneria (b) Zostera (c) Satvia (d) All of these 21. Bees are important to agriculture as they (a) produce wax (b) perform pollination (c) prevent pollination (d) produce honey Chapter 24 N`sp\gM`kmj_p^odjidi Agjr`mdibKg\ion
Sexual Reproduction in Flowering Plants 205 22. Vegetative fertilization involves fusion of (a) two polar nuclei (b) a male gamete and a synergid (c) a male gamete and antipodal cell (d) nucleus of a male gamete and secondary nucleus 23. During double fertilization in plants, one sperm fuses with the egg cell and the other sperm fuses with (a) synergids cell (b) central cell (c) antipodal cell (d) nucellar cell 24. Endosperm is generally (a) diploid (b) triploid (c) haploid (d) polyploid 25. Milky water of green coconut is (a) liquid chalaza (b) liquid nucellus (c) liquid endosperm (d) liquid female gametophyte 26. Scutellum is present in the embryo of (a) pea (b) Ranunculus (c) Triticum (d) None of these 27. Perisperm is a (a) degenerate part of synergids. (b) peripheral part of endosperm. (c) degenerate part of secondary nucleus. (d) remnant of nucellus. 28. False fruits (thalamus also contributes to fruit formation) are found in (a) apple and pear (b) strawberry (c) cashewnut (d) All of these 29. Seeds are adoptively 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 30. The seed in which endosperm is used by embryo is called __________ seed. (a) single (b) albuminous (c) endospermic (d) non-endospermic 31. Apomixis is the (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. 32. Nucellar polyembryony is reported in species of (a) Brassica (b) Gossypium (c) Triticum (d) Citrus STATEMENT TYPE QUESTIONS 33. Which of the following statement is correct for the pollen tube? (a) It shows chemotactic movement. (b) It shows only tip growth. (c) It is composed of three non-cellular zones. (d) It shows radial cytoplasmic streaming. 34. Which of the following statement is incorrect about emasculation? (a) During emasculation process, stigma is removed. (b) Emasculated flowers are bagged in order to prevent self-pollination. (c) Emasculation is the removal of stamens before the maturation of selected bisexual flowers. (d) It is one of the steps for artificial hybridization. 35. Which one of the following statement is incorrect? (a) When pollen is shed at two-celled stage, double fertilization does not take place. (b) Vegetative cell is larger than generative cell. (c) Pollen grains in some plants remain viable for months. (d) Intine is made up of cellulose and pectin. 36. Which of the following statement about sporopollenin is incorrect? (a) Exine is made up of sporopollenin. (b) Sporopollenin is one of the resistant organic materials. (c) Exine has apertures called germ pores where sporopollenin is present. (d) Sporopollenin can withstand high temperatures and strong acids. 37. Which one of the following events takes place after double fertilization? (a) The pollen grain germinates on the stigma. (b) The pollen tubes enter the embryo sac. (c) Two male gametes are discharged into the embryo sac. (d) The PEN (Primary Endosperm Nucleus) develops into endosperm. 38. Which one of the following statement is correct? (a) Sporogenous tissue is haploid. (b) Endothecium produces the microspores. (c) Tapetum nourishes the developing pollen. (d) Hard outer layer of pollen is called intine. 39. Which one of the following statement is correct? (a) Geitonogamy involves the pollen and stigma of flowers of different plants. (b) Cleistogamous flowers are always autogamous. (c) Xenogamy occurs only by wind pollination. (d) Chasmogamous flowers do not open at all. 40. Which of the following statement(s) is/are correct about self-incompatibility ? (i) It is a device to prevent inbreeding. (ii) It provides a biochemical block to self-fertilization. (iii) It ensures cross-fertilization. (iv) It is governed by pollen-pistil interaction. EduHulk 315
206 Biology (v) It is governed by series of multiple alleles. (vi) It prevents self-pollen (from the same flower of other flowers of the same plant) from fertilizing the ovules by inhibiting pollen germination of pollen tube growth in the pistil. (a) (i), (ii) and (iii) (b) (i), (iv) and (v) (c) All of the above (d) None of the above 41. Which of the following statement(s) is/are incorrect ? (i) Endosperm formation starts prior to first division of zygote. (ii) Angiospermic endosperm is mostly 3N while gymnospermic one is N. (iii) The most common type of endosperm is nuclear. (iv) Coconut has both liquid nuclear (multinucleate) and cellular endosperm. (v) Milky water of green tender coconut is liquid female gametophyte. (a) (i) and (ii) (b) Only (iii) (c) Only (v) (d) Only (ii) 42. Which of the following statements are correct for a typical female gametophyte of a flowering plant? (i) It is 8-nucleate and 7-celled at maturity. (ii) It is free-nuclear during the development. (iii) It is situated inside the integument but outside the nucellus. (iv) It has an egg apparatus situated at the chalazal end. (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (ii) (d) (ii) and (iv) 43. Study the following statements and select the correct option. (i) Tapetum nourishes the developing pollen grains. (ii) Hilum represents the junction between ovule and funicle. (iii) In aquatic plants, such as water hyacinth and water lily, pollination is by water. (iv) The primary endosperm nucleus is triploid. (a) (i) and (ii) are correct but (iii) and (iv) are incorrect. (b) (i), (ii) and (iv) are correct but (iii) is incorrect. (c) (ii), (iii) and (iv) are correct but (i) is incorrect. (d) (i) and (iv) are correct but (ii) and (iii) are incorrect. 44. Seeds are adaptively important because (i) they maintain dormancy. (ii) they protect young plants during vulnerable stages. (iii) they store food for young plants, and facilitate dispersal. Identify the correct reasons. (a) (i) and (iii) (b) (ii) and (iii) (c) (i) and (ii) (d) All of the above 45. Which of the given statements are true? (i) During the development of a dicot embryo heart shaped embryo is followed by globular enlarge. (ii) The part of the embryonal axis above the level of cotyledons is epicotyl while the part below the level of cotyledons is hypocotyl. (iii) Monocot seeds possess a single cotyledon represented by scutellum. (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (i) (ii) and (iii) ASSERTION/REASON TYPE QUESTIONS In the following questions, a statement of Assertion is followed by a statement of Reason. (a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. (b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion. (c) If Assertion is true but Reason is false. (d) If both Assertion and Reason are false. 46. Assertion : If a pollen mother cell has 42 chromosomes, the pollen has only 21 chromosomes. Reason : Pollens are formed after meiosis in pollen mother cell. 47. Assertion : Endosperm is a nutritive tissue and it is triploid. Reason: Endosperm is formed by fusion of secondary nucleus to second male gamete. It is used by developing embryo. 48. Assertion : Photomodulation of flowering is a phytochrome regulated process. Reason : Active form of phytochrome (PFR) directly induces floral induction in shoot buds. 49. Assertion : Insects visit flower to gather honey. Reason : Attraction of flowers prevents the insects from damaging other parts of the plant. 50. Assertion : Chasmogamous flowers require pollinating agents. Reason : Cleistogamous flowers do not expose their sex organs. MATCHING TYPE QUESTIONS 51. Match the biotic agent of cross pollination given in column- I with their feature given in 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 EduHulk
Sexual Reproduction in Flowering Plants 207 52. Match the parts of gynoceium given in column I with their definition given in column II. Choose the correct combination from the options given below. Column-I Column-II A. Funicle I. Mass of cells within ovule with more food B. Hilum II. Basal part of ovule C. Integument III. One or Two protective layers of ovule D. Chalaza IV. Region where body of ovule fuses with funicle E. Nucellus V. Stalk of ovule (a) A – I; B – II; C – III; D – IV; E – V (b) A – V; B – IV; C – III; D – II; E – I (c) A – IV; B – II; C – I; D – III; E – V (d) A – I; B – III; C – V; D – II; E – IV 53. Match the items given in column-I with their examples given in column-II and choose the correct option given below. Column-I Column-II (Items) (Examples) A. Ovary I. Groundnut, mustard B. Ovule II. Guava, orange, mango C. Wall of ovary III. Pericarp D. Fleshy fruits IV. Seed E. Dry fruits V. Fruit (a) A – V; B – IV; C – III; D – II; E – I (b) A – I; B – II; C – III; D – IV; E – V (c) A – I; B – III; C – II; D – IV; E – V (d) A – V; B – IV; C – I; D – II; E – III 54. Match the items given in column-I with those given in column-II and choose the correct option given below. Column-I Column-II A. Parthenocarpy I. Inactive state B. Polyembryony II. Meiosis and syngamy are absent C. Apomixis III. Occurrence of more than one embryo D. Dormancy IV. Seedless fruit (a) A – I; B – II; C – III; D – IV (b) A – IV; B – III; C – II; D – I (c) A – IV; B – I; C – II; D – III (d) A – III; B – II; C – I; D – IV 55. Match the items given in column-I with those given in column-II and chose the correct option given below. Column-I Column-II A. Tapetum I. Irregular in shape with abundant food reserve B. Exine II. Acts as nutritive layer C. Pollenkit III. Thick, rigid protective layer D. Vegetative cell IV. Involve in the formation of microspores E. Sporogenous V. Oily and sticky layer, help tissue in pollination. (a) A – II; B – III; C – V; D – IV; E – I (b) A – I; B – III; C – II; D – IV; E – V (c) A – II; B – III; C – I; D – IV; E – V (d) A – II; B – IV; C – V; D – I; E – III 56. Match the items given in column-I with their examples given in column-II and identify the correct option. Column-I Column-II A. Coleorhiza I. Grapes B. Food storing tissue II. Mango C. Parthenocarpic fruit III. Maize D. Single seeded fruit developing IV. Radicle from monocarpellary superior ovary E. Membranous seed coat V. Endosperm (a) A – III; B – I; C – IV; D – II; E – V (b) A – IV; B – II; C – V; D – I; E – III (c) A – V; B – I; C – III; D – IV; E – II (d) A – IV; B – V; C – I; D – II; E – III 57. Which of the following is a mismatched pair? (a) Microsporangium – Pollen sac (b) Megasporangium – Ovule (c) Microsporophyll – Stamen (d) Megasporophyll – Filament 58. Which of the following is a mismatched pair? (a) Storage of pollen grains – – 196°C (b) Pollen allergy – Carrot grass (c) Chasmogamous flowers – Exposed anthers and stigmas (d) Xenogamy – Self-pollination DIAGRAM TYPE QUESTIONS 59. The given figure shows a typical stamen (a) and three dimensional cut section of an anther. Identify A to D respectively marked in the figures (a & b) A B C D Line of dehiscence (a) (b) (a) Anther, Petiole, Pollen sac and Megaspore (b) Anther, Petiole, Megasporangium and Pollen grains (c) Anther, Pedicel, Megasporangium and Pollen grains (d) Anther, Filament, Pollen sac and Pollen grains EduHulk 315