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Published on: 30/08/2022
QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Biology Subject - Botany - Plant Breeding, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
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) Azotobacter |
| i | ii | iii | iv |
| c | a | b | d |
| i | ii | iii | iv |
| d | c | a | b |
| i | ii | iii | iv |
| a | c | b | d |
| i | ii | iii | iv |
| b | a | d | c |
2.
Which of the following is incorrectly paired?
Wheat - Himgiri
Milch breed - Sahiwal
Rice - Ratna
Pusa Komal - Brassica
3.
Which one of the following crop varieties correct matches with its resistance to a disease?
| Variety | Resistance to disease |
| Pusa Komal | Bacterial blight |
| Variety | Resistance to disease |
| Pusa Sadabahar | White rust |
| Variety | Resistance to disease |
| Pusa Shubhra | Chilli mosaic virus |
| Variety | Resistance to disease |
| Brassica | Pusa swarnim |
4.
A wheat variety, Atlas 66 which has been used as a donor for improving cultivated wheat, which is rich in ______.
iron
carbohydrates
proteins
vitamins
5.
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 | II | III | IV |
| iv | iii | ii | i |
| I | II | III | IV |
| ii | i | iii | iv |
| I | II | III | IV |
| ii | iv | i | iii |
| I | II | III | IV |
| i | iii | iv | ii |
6.
Which one of the following are the species that are crossed to give sugarcane varieties with high sugar, high yield, thick stems and 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
7.
Jaya and Ratna are the semi dwarf varieties of ______.
wheat
rice
cowpea
mustard
8.
Progeny obtained as a result of repeat self pollination a cross pollinated crop to called
pure line
pedigree line
inbreed line
heterosis
9.
Crosses between the plants of the same variety are called ____.
interspecific
inter varietal
intra varietal
inter generic
10.
11.
12.
Plants having similar genotypes produced by plant breeding are called _____.
clone
haploid
autopolyploid
genome
13.
Desired improved variety of economically useful crops are raised by _______.
Natural Selection
hybridization
mutation
biofertilisers
14.
The quickest method of plant breeding is _______.
Introduction
Selection
Hybridization
Mutation breeding
15.
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 | ii | iii | iv |
| I | II | III | IV |
| i | ii | iii | iv |
| III | I | IV | II |
| i | ii | iii | iv |
| IV | II | I | IV |
| i | ii | iii | iv |
| II | IV | III | I |
16.
Pick out the odd pair
Mass selection - Morphological characters
Pureline selection - Repeated self pollination
Clonal selection - Sexually propagated
Natural selection - Involves nature
17.
While studying the history of domestication of various cultivated plants _______ were recognized earlier
Centres of origin
Centres of domestication
Centres of hybrid
Centres of variation
18.
Assertion(A): Genetic variation provides the raw material for selection
Reason(R): Genetic variations are differences in genotypes of the 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.
1.
(b)
| i | ii | iii | iv |
| d | c | a | b |
2.
(d)
Pusa Komal - Brassica
3.
(a)
| Variety | Resistance to disease |
| Pusa Komal | Bacterial blight |
4.
(c)
proteins
5.
(b)
| I | II | III | IV |
| ii | i | iii | iv |
6.
(a)
Saccharum robustum and Saccharum officinarum
7.
(b)
rice
8.
(a)
pure line
9.
(c)
intra varietal
10.
(c)
11.
(d)
12.
(a)
clone
13.
(b)
hybridization
14.
(d)
Mutation breeding
15.
(b)
| i | ii | iii | iv |
| III | I | IV | II |
16.
(c)
Clonal selection - Sexually propagated
17.
(a)
Centres of origin
18.
(c)
Both reason and assertion is right.
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Tamilnadu Stateboard 12th Standard Subjects

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Economics

Commerce

Accountancy

History

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Biology

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Computer Applications

Computer Science

Business Maths and Statistics

Commerce

Economics

Maths

Chemistry

Physics

Computer Technology

History

Accountancy

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