10 MCQ on Plant Science for various Agriculture Exams✅ Part -66

91. The sausage tree (Kigelia pinnata) is pollinated by
    (a) Bat
    (b) Bird
    (c) Wind
    (d) Water

92. Double fertilization involves
    (a) Fusion of secondary nucleus with both male gametes
    (b) Fusion of secondary nucleus with one male gamete
    (c) Fusion of one polar nucleus with one male gamete
    (d) Any of the above, depending on species

93. The arrangement of megaspores in a tetrad in an Angiosperm is
    (a) Decussate
    (b) Tetrahedral
    (c) Linear
    (d) Isobilateral

94. Apomixis is a type of reproduction that results in the development of a/an
    (a) New organism without fusion of gametes
    (b) New organism from fusion products of gametes
    (c) Embryo from endosperm
    (d) Embryo from nucellus

95. If any somatic cell of sporophyte produces gametophyte without reduction division, it is
    (a) Parthenogenesis
    (b) Apogamy
    (c) Apospory
    (d) Amphimixis

96. The development of fruit without fertilization is
    (a) Parthenogenesis
    (b) Parthenocarpy
    (c) Apomixis
    (d) Apogamy

97. The natural barrier existing between androecium and gynoecium which favours allogamy is
    (a) Cleistogamy
    (b) Homogamy
    (c) Herkogamy
    (d) All above

98. The sexual reproduction in plants was first reported by
    (a) Nawaschin
    (b) Camerius
    (c) Hanstein
    (d) Amici

99. Egg apparatus consists of
    (a) Egg
    (b) Egg and polar nuclei
    (c) Egg and synergids
    (d) Egg and antipodal cells

100. In Bryophyllum, vegetative propagation by bulbils occurs in
     (a) Roots
     (b) Leaves
     (c) Rhizomes
     (d) Stem

101. Vegetative propagation by bulbils occurs in
     (a) Agave
     (b) Gingiber
     (c) Vallisneria
     (d) Curcuma

102. Intraspecific incompatibility can be overcome by
     (a) Wetting of anthers
     (b) Mixed pollination
     (c) Intravarian fertilization
     (d) Intraspecific pollination

103. In angiosperms, all the four microspores of tetrad are covered by a layer which is formed by
     (a) Pecto-cellulose
     (b) Callose
     (c) Cellulose
     (d) Sporopollenin

104. Which type of association is found between entomophilous flower and pollinating agent?
     (a) Mutualism
     (b) Commensalism
     (c) Cooperation
     (d) Coevolution

105. What is the direction of micropyle in anatropous ovule?
     (a) Upward
     (b) Downward
     (c) Right
     (d) Left

106. In angiosperms, pollen tubes liberate their male gametes into the
     (a) Central cell
     (b) Antipodal cell
     (c) Egg cell
     (d) Synergids