Plant Breeding Test

Plant Breeding

This is online test 03 for CBSE class 12 Biology Strategies for Enhancement in Food Production (Plant breeding).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Plant can be made disease resistant through
  • A
    Hormone treatment
  • B
    Breeding with wild varieties
    Correct
  • C
    Colchicine treatment
  • D
    X-ray treatment
2
Mass selection is preferred in case of
  • A
    Vegetatively propagated plants
  • B
    Cross pollinated plants
  • C
    Self-pollinated plants
    Correct
  • D
    None of these
3
Pusa RH-10 is a
  • A
    Long and scented grained variety of Rice
    Correct
  • B
    Lysine rich amber coloured Wheat variety
  • C
    High yielding variety of Sunflower
  • D
    Long stapled coloured variety of Cotton
4
Haploid plantlets can be produced by
  • A
    Embryo culture
  • B
    Pollen culture
    Correct
  • C
    Cotyledon culture
  • D
    Meristem culture
5
Which one is not an aim of plant breeding
  • A
    Early maturing varieties
  • B
    Late maturing varieties
    Correct
  • C
    high-yielding varieties
  • D
    disease-free varieties
6
Selection of homozygous plant is
  • A
    Mixed selection
  • B
    Pure line selection
    Correct
  • C
    Mass selection
  • D
    None of these
7
Heterosis cannot be maintained in sexually reproducing plants as it disappear on
  • A
    Out breeding
  • B
    Cross breeding
  • C
    All of the above
  • D
    Inbreeding
    Correct
8
Gene banks comprise
  • A
    Tissue culture and cryopreservation
  • B
    Seed banks, orchards, tissue culture and cryopreservation
    Correct
  • C
    Seed banks and cryopreservation
  • D
    Seed banks, tissue culture, and cryopreservation
9
Which of the following is the consequence of plant disease i. Reduced yield. ii. Lower quality of produce iii. Increased cost of production iv. Poisonous produce v. Variation in the genome.
  • A
    Only iii, iv and v
  • B
    Only i, iii, iv and v
  • C
    Only ii, iii, iv and v
  • D
    Only i, ii, iii and iv
    Correct
10
In crop improvement program, haploids are important because they
  • A
    Grow better under adverse conditions
  • B
    Require one half of nutrients
  • C
    Form perfect homozygous individuals on diploidisation
    Correct
  • D
    Are helpful in study of meiosis