10 MCQ on Plant Science for various Agriculture Exams✅ Part -74

1. Syngamy refers to
   (a) Fusion of one of the sperms with secondary nucleus
   (b) Fusion of one of the sperms with the egg
   (c) Fusion of one of the sperms with the egg and other with the secondary nucleus
   (d) Fusion of one of the sperms with synergid

2. Porogamy is
   (a) Entry of the pollen tube in the ovule through micropyle
   (b) Entry of the pollen tube in the ovule through chalaza
   (c) Entry of the pollen tube in the stigma and style
   (d) Entry of the pollen tube in the ovule through integuments

3. Endosperm in Angiosperms results after fertilization from
   (a) Zygote
   (b) Secondary nucleus
   (c) Antipodals
   (d) Synergids

4. When pollen tube enters through the funiculus or the integuments or the base of the ovule, it is called as
   (a) Chalazogamy
   (b) Mesogamy
   (c) Isogamy
   (d) Porogamy

5. Meiotic division in an ovule takes place in
   (a) Megaspore
   (b) Archesporium
   (c) Nucellus
   (d) Megaspore mother cell

6. Double fertilization is characteristic only of
   (a) Bryophytes
   (b) Pteridophytes
   (c) Gymnosperms
   (d) Angiosperms

7. When a microspore mother cell with 40 chromosomes undergoes meiosis, each of the four resulting cells has
   (a) 80 chromosomes
   (b) 40 chromosomes
   (c) 20 chromosomes
   (d) 10 chromosomes

8. In a pollen grain, larger nucleus is
   (a) Generative nucleus
   (b) Tube nucleus
   (c) Vegetative nucleus
   (d) None

9. Sexual reproduction leads to
   (a) Parthenogenesis
   (b) Recombination
   (c) Polyploidy
   (d) Apomixis

10. Endothecium and tapetum in anther are derived from
    (a) Primary parietal layer
    (b) Primary sporogenous layer
    (c) Both (a) and (b)
    (d) None of these

11. A microspore mother cell forms
    (a) An ovule
    (b) Embryo sacs
    (c) A pollen sac
    (d) Pollen grains

12. Anther is generally composed of
    (a) Two sporangia
    (b) Three sporangia
    (c) Four sporangia
    (d) Only one sporangium

13. If the number of chromosomes in root cells is 14, what will be the number of chromosomes in synergid cells of an ovule of that parent?
    (a) 7
    (b) 14
    (c) 21
    (d) 28