10 MCQ on Plant Science for various Agriculture Exams✅ Part -69

61. Allogamy is best favoured by
    (a) Dichogamy
    (b) Dicliny
    (c) Cleistogamy
    (d) Homogamy

62. Father of Indian Angiosperm embryology is
    (a) B. M. Johri
    (b) B. G. L. Swamy
    (c) R. N. Kapil
    (d) P. Maheshwari

63. In an angiosperm, male plant is diploid and female plant tetraploid, endosperm will be
    (a) Haploid
    (b) Triploid
    (c) Tetraploid
    (d) Pentaploid

64. Double fertilization was first discovered by Nawaschin (1898) in
    (a) Lilium and Fritillaria
    (b) Mango and Sugarcane
    (c) Papaya and Pea
    (d) Brassica and Candytuft

65. Double fertilization means fusion of
    (a) One of the polar nuclei with the other and one male gamete with egg cell
    (b) One of the male gametes with polar nuclei and other with antipodal cell
    (c) One of the male gametes with secondary nucleus and one male gamete with egg cell
    (d) One antipodal cell with egg cell and one synergid cell with antipodal cell

66. If testa is removed from water-soaked gram seed, the remaining structure is
    (a) Full mature embryo
    (b) Cotyledons with endosperm
    (c) Cotyledons filled with starch
    (d) None of the above

67. Cleistogamy occurs in
    (a) Pisum sativum
    (b) Oryza sativa
    (c) Allium cepa
    (d) Brassica campestris

68. Which among the following are pollinated by bat
    (a) Salvia
    (b) Ophrys
    (c) Kigellia
    (d) Brassica

69. An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for a female of its species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called
    (a) Pseudoparthenocarpy
    (b) Mimicry
    (c) Pseudopollination
    (d) Pseudocopulation

70. Which plant will lose its economic value if its fruits are produced by induced parthenocarpy?
    (a) Grape
    (b) Pomegranate
    (c) Orange
    (d) Banana

71. The embryo in sunflower has
    (a) No cotyledons
    (b) One cotyledon
    (c) Two cotyledons
    (d) Many cotyledons

72. The role of double fertilization in angiosperms is to produce
    (a) Endosperm
    (b) Integuments
    (c) Cotyledons
    (d) Endocarp

73. An orthotropous ovule is one in which micropyle and chalaza are
    (a) At right angles to funicle
    (b) Parallel to the funicle
    (c) In straight line of funicle
    (d) Parallel along with ovule

74. A hyaline, bisexual and self-fertilized flower that does not open at all, is
    (a) Chasmogamous
    (b) Apogamous
    (c) Cleistogamous
    (d) Malacophilous