Three crops that contribute maximum to global food grain production are                  
1. wheat , rice and maize
2. Rice, maize and sorghum
3. Wheat, maize and sorghum
4. Wheat, rice and barley 

Why is vivipary an undesirable character for annual crop plants
1. It reduces the vigor of the plant.
2. The seeds exhibit long dormancy.
3. It adversely affects the fertility of the plant.
4. The seeds cannot be stored under normal conditions for next season.

 

Triticale, the first man-made cereal, has been obtained by crossing wheat with        
1. Rye
2. Pearl millet
3. Sugarcane
4. Barley 

Crop plants grown in monoculture are 

1. Low in yield.
2. Free from intraspecific competition.
3. Characterized by poor root system.
4. Highly prone to pests.

In order to obtain virus-free plants through tissue culture the best method is                  
1. protoplast culture
2. embryo rescue
3. anther culture
4. meristem culture 

In maize, hybrid vigor is exploited by      
1. bombarding the protoplast with DNA
2. crossing of two inbred parental lines
3. harvesting seeds from the most productive plants
4. inducing mutations 

In the cloning of cattle, a fertilized egg is taken out of the mother’s womb and:   

Which one of the following is a viral disease of poultry? 
1. Pasteurellosis
2. Salmonellosis
3. Coryza
4. New castle disease 

Probiotics are     
1. live microbial food supplement
2. safe antibiotics
3. cancer-inducing microbes
4. new kind of food allergens 

Consider the following four measures (a-d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common                                       

a. Spray with Bordeaux mixture
b. Control of insect vector of the disease pathogen
c. Use of only disease-free seeds
d. Use of varieties resistant to the disease

Which two of the above measures can control the disease?
1. (a) and (d)
2. (b) and (c)
3. (a) and (b)
4. (c) and (d)