Sexual Reproduction in Flowering Plants PYQs Set 2 (PDF)

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Set 2 of 4 · Questions 31-60 of 108

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Mere Teacher · Previous Year Questions NEET Biology · Sexual Reproduction in Flowering Plants · Set 2 (Q31-60)
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31. $What does the filiform apparatus do at the entrance into ovule?$ (1) $It brings about opening of the pollen tube$ (2) $It guides pollen tube from a synergid to egg$ (3) $It helps in the entry of pollen tube into a synergid$ (4) $It prevents entry of more than one pollen tube into the embryo sac$ 32. $Pollination in water hyacinth and water lily is brought about by the agency of$ (1) $Insects or wind$ (2) $Birds$ (3) $Bats$ (4) $Water$ 33. $Which one of the following statements is not true?$ (1) $Tapetum helps in the dehiscence of anther$ (2) $Exine of pollen grains is made up of sporopollenin$ (3) $Pollen grains of many species cause severe allergies$ (4) $Stored pollen in liquid nitrogen can be used in the crop breeding programmes$ 34. $Nucellar polyembryony is reported in species of :-$ (1) $Citrus$ (2) $Gossypium$ (3) $Triticum$ (4) $Brassica$ 35. $Even in the absence of pollinating agents seed-setting is assured in$ (1) $Commelina$ (2) $Zostera$ (3) $Salvia$ (4) $Fig$ 36. $Which one of the following statements regarding postfertilization development in flowering plants is incorrect?$ (1) $Ovary develops into fruit$ (2) $Zygote develops into embryo$ (3) $Central cell develops into endosperm$ (4) $Ovules develop into embryo sac$ 37. $In water hyacinth and water lily, pollination takes place by:$ (1) $Water currents only$ (2) $Wind and water$ (3) $Insects and water$ (4) $Insects or wind$ 38. $Which one of the following statements is not true?$ (1) $Pollen grains are rich in nutrients and they are used in the form on tablets and syrups.$ (2) $Pollen grains of some plants cause severe allergies and bronchial affliations in some people.$ (3) $The flowers pollinated by flies and bats secrete foul odour to attract them.$ (4) $Honey is made by bees by digesting pollen collected from flowers.$ 39. $Which one of the following may require pollinators, but it is genetically similar to autogamy?$ (1) $Geitonogamy$ (2) $Xenogamy$ (3) $Apogamy$ (4) $Cleistogamy$ 40. $Endosperm is consumed by developing embryo in the seed of :-$ (1) $Pea$ (2) $Maize$ (3) $Coconut$ (4) $Castor$ 41. $The correct water from tender coconut represents:$ (1) $Endocarp$ (2) $Fleshy mesocarp$ (3) $Free nuclear proembryo$ (4) $Free nuclear endosperm$ 42. $The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is :$ (1) $Xenogamy$ (2) $Geitonogamy$ (3) $Chasmogamy$ (4) $Cleistogamy$ 43. $Functional megaspore in an angiosperm develops into?$ (1) $Endosperm$ (2) $Embryo sac$ (3) $Embryo$ (4) $Ovule$ 44. $What is the function of tassels in the corn cob?$ (1) $To protect seeds$ (2) $To attract insects$ (3) $To trap pollen grains$ (4) $To disperse pollen grains$ 45. $Identify the incorrect statement related to Pollination:$ (1) $Moths and butterflies are the most dominant pollinating agents among insects$ (2) $Pollination by water is quite rare in flowering plants$ (3) $Pollination by wind is more common amongst abiotic pollination$ (4) $Flowers produce foul odours to attract flies and beetles to get pollinated$ 46. $The residual persistent part which forms the perisperm in the seeds of beet is :$ (1) $Calyx$ (2) $Endosperm$ (3) $Nucellus$ (4) $Integument$ 47. $Even in absence of pollinating agents seed setting is assured in :-$ (1) $Salvia$ (2) $Fig$ (3) $Commellina$ (4) $Zostera$ 48. $Which one of the following statements is wrong?$ (1) $Pollen grains in some plants remain viable for months.$ (2) $Intine is made up of cellulose and pectin.$ (3) $When pollen is shed at two - celled stage, double fertilization does not take place.$ (4) $Vegetative cell is larger than generative cell.$ 49. $Apomictic embryos in citrus arise from :$ (1) $Diploid egg,$ (2) $Synergids$ (3) $Maternal sporophytic tissue in ovule$ (4) $Antipodal cells$ 50. $The coconut water from tender coconut represents:-$ (1) $Endocarp$ (2) $Fleshy mesocarp$ (3) $Free nuclear proembryo$ (4) $Free nuclear endosperm$ 51. $An example of a seed with endosperm, perisperm, and caruncle is :-$ (1) $Castor$ (2) $Cotton$ (3) $Coffee$ (4) $Lily$ 52. $Pollen grains can be stored for several years in liquid nitrogen having a temperature of$ (1) $-120°C$ (2) $-80°C$ (3) $-196°C$ (4) $-160°C$ 53. $Which one of the following is surrounded by a callose wall?$ (1) $Pollen grain$ (2) $Microspore mother cell$ (3) $Male gamete$ (4) $Egg$ 54. $In angiosperms, functional megaspore develops into :$ (1) $Pollen sac$ (2) $Embryo sac$ (3) $Ovule$ (4) $Endosperm$ 55. $Which one of the following statements is correct?$ (1) $Hard outer layer of pollen is called intine.$ (2) $Sporogenous tissue is haploid.$ (3) $Endothecium produces the microcspores.$ (4) $Tapetum nourishes the developing pollen$ 56. $Filliform apparatus is a characteristic feature of$ (1) $Egg$ (2) $Synergid$ (3) $Zygote$ (4) $Suspensor$ 57. $Which one of the following generates new genetic combinations leading to variation?$ (1) $Sexual reproduction$ (2) $Nucellar polyembryony$ (3) $Vegetative reproduction$ (4) $Parthenogenesis$ 58. $Persistent nucellus in the seed is known as$ (1) $Chalaza$ (2) $Perisperm$ (3) $Hilum$ (4) $Tegmen$ 59. $Both, autogamy and geitonogamy are prevented in:-$ (1) $Castor$ (2) $Maize$ (3) $Papaya$ (4) $Cucumber$ 60. $Male gametes in angiosperms are formed by the division of :-$ (1) $Microspore mother cell$ (2) $Microspore$ (3) $Generative cell$ (4) $Vegetative cell$