10 MCQ on Plant Science for various Agriculture Exams✅ Part -76

28. Apomixis in plants means development of a
    (a) Plant from stem cuttings
    (b) New plant without fusion of gametes
    (c) Plant through seed formation
    (d) Plant through grafting

29. Fertilization is the process of
    (a) Fusion of one male gamete with the egg cell
    (b) Transfer of pollens from anther to stigma
    (c) Fusion of male nuclei with polar nuclei
    (d) Fusion of protoplasm of gametes

30. The number of meiotic divisions necessary to produce 1000 pollen grains is
    (a) 200
    (b) 250
    (c) 500
    (d) 1000

31. Pollen tube allows
    (a) Microspore to penetrate in the ovule at the time of fertilization
    (b) Entry of germination of pollen grains
    (c) Activity of fertilization
    (d) Power of pollen grain

32. Karyogamy means
    (a) Growing up of pollen grain
    (b) Fusion of gametic protoplasm
    (c) Fusion of gametic nuclei
    (d) Delayed meiosis

33. Pentanephrophyte in angiosperms is represented by
    (a) Egg
    (b) Carpel
    (c) Oospore
    (d) Pollen grain

34. The term “Xenia” denotes the effect of pollen on the
    (a) Egg
    (b) Pollen grain
    (c) Root
    (d) Endosperm

35. After penetrating the stigma and style, the pollen tube grows down towards the egg because
    (a) It is heavier than other tissues
    (b) They have similar electric charges
    (c) The excited magnetic field energises its growth
    (d) It has no other passage to follow

36. Male gametophyte in angiosperms is represented by
    (a) Nucellus
    (b) Stamens
    (c) Microspore (pollen grain)
    (d) Endospermic cells

37. Scion term in relation to grafting has been derived from
    (a) Paleobotany
    (b) Paleobotany
    (c) Cytology
    (d) Embryology

38. If diploid chromosome number in plant is 12, then chromosomes will be present in
    (a) Cotyledonary cells
    (b) Endospermic cells
    (c) Endosperm cells
    (d) Embryo sac

39. In angiosperms meiosis occurs when
    (a) Seeds are formed
    (b) Flowers are formed
    (c) Pollen grains are formed
    (d) Pollen grains are shed

40. In which of the following does the germination of embryo occur normally when fruit is still attached to plant?
    (a) Epiphytes
    (b) Pinus
    (c) Mango
    (d) Mangrove plants (Halophytes)