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12th Standard Botany - Plant Breeding English Medium Free Online Test One Mark Questions 2020 - 2021

12th Standard

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Botany

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. Assertion(A): Genetic variation provides the raw material for selection
    Reason(R): Genetic variations are differences in genotypes of the individuals.

    (a)

    Assertion is right and reason is wrong.

    (b)

    Assertion is wrong and reason is right

    (c)

    Both reason and assertion is right.

    (d)

    Both reason and assertion is wrong.

  2. The quickest method of plant breeding is _______.

    (a)

    Introduction

    (b)

    Selection

    (c)

    Hybridization

    (d)

    Mutation breeding

  3. Plants having similar genotypes produced by plant breeding are called _____.

    (a)

    clone

    (b)

    haploid

    (c)

    autopolyploid

    (d)

    genome

  4. Dwarfing gene of wheat is ______.

    (a)

    pal 1

    (b)

    Atomita 1

    (c)

    Norin 10

    (d)

    pelita 2

  5. A wheat variety, Atlas 66 which has been used as a donor for improving cultivated wheat, which is rich in ______.

    (a)

    iron

    (b)

    carbohydrates

    (c)

    proteins

    (d)

    vitamins

  6. ________is the process of bringing a plant species under human control.

    (a)

    Emasculation

    (b)

    Hybridization

    (c)

    Domestication

    (d)

    Acclimatization

  7. Identify the incorrect statement:

    (a)

    Bio-inoculants are efficient in solubilising phosphate

    (b)

    Bio-inoculants are ecofriendly organic agro outputs

    (c)

    Bio-inoculants are obtained from dead organic matters

    (d)

    Bio-inoculants are designed to improve soil fertility

  8. Arbuscular mycorrhizae is a symbiotic association between ____________

    (a)

    Algae and fungi

    (b)

    Angiosperm roots and fungi

    (c)

    Blue-green algae and Azolla fern

    (d)

    Cyanobacteria and corolloid root

  9. Assertion (A): Hybrids show increased growth and elevated yield.
    Reason (R): F1 hybrids show Heterosis.

    (a)

    Both A and R are true. R explains A.

    (b)

    A is true R is false

    (c)

    A is false R is true

    (d)

    Both A and R are false

  10. Intraspecific hybridization is also termed as __________ 

    (a)

    Intravarietal hybridization

    (b)

    Intervarietal hybridization

    (c)

    Interspecific hybridization

    (d)

    Intergeneric hybridization

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