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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

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

Published on: 05/11/2020

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.

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Std: 12th Standard - Biology

chapter: - Model Question paper

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Questions:

Multiple Choice Question

10 x 1 = 10

Pusa Sawani variety of okra is resistant against __________

(a)

Aphids

(b)

Fruit borers

(c)

Shoot and fruit borers

(d)

Jassids

Raphanobrassica is an example for____________

(a)

Autopolyploid

(b)

Allopolyploid

(c)

Polyploid

(d)

Polysomy

Identify the proper sequence of hybridisation technique

(a)

Emasculation ⟶ Selection ⟶ Bagging ⟶ Crossing ⟶ Harvesting

(b)

Harvesting ⟶ Selection ⟶ Crossing ⟶ Emasculation ⟶ Bagging

(c)

Selection ⟶ Harvesting ⟶ Crossing ⟶ Emasculation ⟶ Bagging

(d)

Selection ⟶ Emasculation ⟶ Bagging ⟶ Crossing ⟶ Harvesting

Assertion (A): Pure line varieties show homozygosity.
Reason (R): Pure line species are obtained through cross-pollination.

(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

Azolla is best suited biofertilizer for _________

(a)

Sugar cane cultivation

(b)

Paddy cultivation

(c)

Wheat cultivation

(d)

Cotton cultivation

Which of the following scientist developed world's first cotton hybrid?

(a)

Dr. B.P. Pal

(b)

C.T. Patel

(c)

Dr. K. Ramiah

(d)

N.G.P. Rao

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

(a)

Variety	Resistance to disease
Pusa Komal	Bacterial blight

(b)

Variety	Resistance to disease
Pusa Sadabahar	White rust

(c)

Variety	Resistance to disease
Pusa Shubhra	Chilli mosaic virus

(d)

Variety	Resistance to disease
Brassica	Pusa swarnim

Desired improved variety of economically useful crops are raised by _______.

(a)

Natural Selection

(b)

hybridization

(c)

mutation

(d)

biofertilisers

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