Strategies for Enhancement in Food Production

NEET Biology · 50 questions · Page 4 of 5 · Click an option or "Show Solution" to reveal answer

Q31

Consider measures to control bacterial blight disease in chickpea: (i) Spray with Bordeaux mixture (ii) Control of insect vector (iii) Use of only disease-free seeds (iv) Use of varieties resistant to the disease. Which two measures can control the disease?

A (i) and (ii)

B (i) and (iv)

C (ii) and (iii)

D (iii) and (iv)

Correct Answer

Option B

Solution

Use of Bordeaux mixture and disease-resistant varieties are effective measures for bacterial blight control in chickpea.

Q32

In cloning of cattle, fertilized egg at eight cell stage - cells are separated and cultured until small embryos are formed which are then:

A Implanted back into original mother

B Divided into 4 pairs of cells implanted into other cows

C Cultured to form embryos then implanted into other cows

D Each develops into a complete organism in vitro

Correct Answer

Option C

Solution

In cattle cloning, cells are separated and cultured until small embryos are formed, which are then implanted into surrogate mothers.

Q33

In maize, hybrid vigour is exploited by:

A Crossing of two inbred parental lines

B Bombarding the seeds with DNA

C Harvesting seeds from the most productive plants

D Inducing mutations

Correct Answer

Option A

Solution

Heterosis/hybrid vigour in maize is exploited by crossing two inbred parental lines.

Q34

Which one of the following is a viral disease of poultry?

A Salmonellosis

B New Castle disease

C Pasteurellosis

D Coryza

Correct Answer

Option B

Solution

Newcastle disease is a highly contagious viral disease of domestic poultry and wild birds.

Q35

In order to obtain virus-free plants through tissue culture the best method is:

A Anther culture

B Protoplast culture

C Meristem culture

D Embryo rescue

Correct Answer

Option C

Solution

Meristem culture is done for development of virus-free plants as meristematic cells are not infected by viruses.

Q36

Crop plants grown in monoculture are:

A Characterised by poor root system

B Highly prone to pests

C Low in yield

D Free from intraspecific competition

Correct Answer

Option B

Solution

Crop plants grown in monoculture are highly prone to pests due to uniformity.

Q37

Triticale, the first man-made cereal crop, has been obtained by crossing wheat with

A Pearl millet

B Sugarcane

C Rye

D Barley

Correct Answer

Option C

Solution

Triticale is produced by intergeneric hybridization between common wheat (Triticum aestivum) and European rye (Secale cereale).

Q38

Three crops that contribute maximum to global food grain production are:

A Wheat, maize and sorghum

B Wheat, rice and barley

C Wheat, rice and maize

D Rice, maize and sorghum

Correct Answer

Option C

Solution

Wheat, rice and maize contribute to about two-thirds of the total world food production.

Q39

Which of the following is generally used for induced mutagenesis in crop plants?

A UV (260 nm)

B Alpha particles

C Gamma rays (from cobalt 60)

D X rays

Correct Answer

Option C

Solution

Gamma rays from cobalt-60 are used for induced mutagenesis.

Sharbati Sonora and Pusa Lerma wheat varieties were produced by gamma ray treatment.

Q40

The name of Norman Borlaug is associated with:

A Blue Revolution

B Yellow Revolution

C Green Revolution

D White Revolution

Correct Answer

Option C

Solution

Norman Borlaug won the Nobel Peace Prize in 1970 for his work in the Green Revolution.

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