Tamil Nadu Board of Secondary EducationHSC Science Class 12th
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Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Biology Botany answers guide chapter 9 - Plant Breeding [Latest edition]

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Class 12th Biology Botany answers guide - Shaalaa.com
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Chapter 9: Plant Breeding

Evaluation
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Evaluation [Pages 181 - 182]

Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Biology Botany answers guide Chapter 9 Plant BreedingEvaluation [Pages 181 - 182]

Evaluation | Q 1 | Page 181

Assertion: Genetic variation provides the raw material for selection

Reason: Genetic variations are differences in genotypes of individuals.

  • Assertion is right and reason is wrong.

  • Assertion is wrong and reason is right.

  • Both reason and assertion is right.

  • Both reason and assertion is wrong.

Evaluation | Q 2 | Page 181

While studying the history of the domestication of various cultivated plants _______ were recognized earlier.

  • Centres of origin

  • Centres of domestication

  • Centres of hybrid

  • Centres of variation

Evaluation | Q 3 | Page 181

Pick out the odd pair.

  • Mass selection - Morphological characters

  • Purline selection - Repeated self pollination

  • Clonal selection - Sexually propagated

  • Natural selection - Involves nature

Evaluation | Q 4 | Page 181

Match Column I with Column II

Column I Column II
i) William S. Gaud I) Heterosis
ii) Shull II) Mutation breeding
iii) Cotton Mather III) Green revolution
iv) Muller and Stadler IV) Natural hybridization
  • i – I, ii – II, iii – III, iv – IV

  • i – III, ii – I, iii – IV, iv – II

  • i – IV, ii – II, iii – I, iv – IV

  • i – II, ii – IV, iii – III, iv – I

Evaluation | Q 5 | Page 181

The quickest method of plant breeding is

  • Introduction

  • Selection

  • Hybridization

  • Mutation breeding

Evaluation | Q 6 | Page 181

Desired improved variety of economically useful crops are raised by

  • Natural Selection

  • hybridization

  • mutation

  • biofertilisers

Evaluation | Q 7 | Page 181

Plants having similar genotypes produced by plant breeding are called

  • clone

  • haploid

  • autopolyploid

  • genome

Evaluation | Q 8 | Page 181

Importing better varieties and plants from outside and acclimatizing them to the local environment is called

  • cloning

  • heterosis

  • selection

  • introduction

Evaluation | Q 9 | Page 181

Dwarfing gene of wheat is

  • pal 1

  • Atomita 1

  • Norin 10

  • pelita 2

Evaluation | Q 10 | Page 181

Crosses between the plants of the same variety are called

  • interspecific

  • inter varietal

  • intra varietal

  • inter generic

Evaluation | Q 11 | Page 181

Progeny obtained as a result of repeat self-pollination a cross-pollinated crop to called

  • pure line

  • pedigree line

  • inbreed line

  • heterosis

Evaluation | Q 12 | Page 181

Jaya and Ratna are the semi dwarf varieties of

  • wheat

  • rice

  • cowpea

  • mustard

Evaluation | Q 13 | Page 181

Which one of the following are the species that are crossed to give sugarcane varieties with high sugar, high yield, thick stems, and the ability to grow in the sugarcane belt of North India?

  • Saccharum robustum and Saccharum officinarum

  • Saccharum barberi and Saccharum officinarum

  • Saccharum sinense and Saccharum officinarum

  • Saccharum barberi and Saccharum robustum

Evaluation | Q 14 | Page 181

Match column I (crop) with column II (Corresponding disease-resistant variety) and select the correct option from the given codes.

Column I Column II
I) Cowpea i) Himgiri
II) Wheat ii) Pusa Komal
III) Chilli iii) Pusa Sadabahar
IV) Brassica iv) Pusa Swarnim
  • I - iv, II - iii, III - ii, IV - i

  • I - ii, II - i, III - iii, IV - iv

  • I - ii, II - iv, III - i, IV - iii

  • I - i, II - iii, III - iv, IV - ii

Evaluation | Q 15 | Page 182

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

  • iron

  • carbohydrates

  • proteins

  • vitamins

Evaluation | Q 16 | Page 182

Which one of the following crop varieties correct matches with its resistance to disease?

Variety Resistance to disease
a) Pusa Komal Bacterial blight
b) Pusa Sadabahar White rust
c) Pusa Shubhra Chilli mosaic virus
d) Brassica Pusa swarnim
Evaluation | Q 17 | Page 182

Which of the following is incorrectly paired?

  • Wheat - Himgiri

  • Milch breed - Sahiwal

  • Rice - Ratna

  • Pusa Komal - Brassica

Evaluation | Q 18 | Page 182

Match List I with List II

List I List II
Biofertilizer Organisms
i) Free-living N2 a) Aspergillus
ii) Symbiotic N2 b) Amanita
iii) P Solubilizing c) Anabaena azollae
iv) P Mobilizing d) Azotobactor
  • i - c, ii - a, iii - b, iv - d

  • i - d, ii - c, iii - a, iv - b

  • i - a, ii - c, iii - b, iv - d

  • i - b, ii - a, iii - d, iv - c

Evaluation [Page 182]

Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Biology Botany answers guide Chapter 9 Plant BreedingEvaluation [Page 182]

Evaluation | Q 19 | Page 182

Differentiate primary introduction from secondary introduction.

Evaluation | Q 20 | Page 182

How are microbial innoculants used to increase soil fertility?

Evaluation | Q 21 | Page 182

What are the different types of hybridization?

Evaluation | Q 22 | Page 182

Explain the best-suited type followed by plant breeders at present?

Evaluation | Q 23 | Page 182

Write a note on heterosis.

Evaluation | Q 24 | Page 182

List out the new breeding techniques involved in developing new traits in plant breeding.

Chapter 9: Plant Breeding

Evaluation
Class 12th Biology Botany answers guide - Shaalaa.com

Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Biology Botany answers guide chapter 9 - Plant Breeding

Tamil Nadu Board Samacheer Kalvi solutions for Class 12th Biology Botany answers guide chapter 9 (Plant Breeding) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Tamil Nadu Board of Secondary Education Class 12th Biology Botany answers guide solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Class 12th Biology Botany answers guide chapter 9 Plant Breeding are Origin of Agriculture, History of Agriculture, Organic Agriculture, Conventional Plant Breeding Methods, Modern Plant Breeding, Relationship Between Humans and Plants, Domestication of Plants, Plant Breeding.

Using Tamil Nadu Board Samacheer Kalvi Class 12th solutions Plant Breeding exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Tamil Nadu Board Samacheer Kalvi Solutions are important questions that can be asked in the final exam. Maximum students of Tamil Nadu Board of Secondary Education Class 12th prefer Tamil Nadu Board Samacheer Kalvi Textbook Solutions to score more in exam.

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