Strategies for Enhancement in Food Production

Crop plants grown in monoculture are-

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

In Maize, hybrid vigour is exploited by-

1. Crossing of two inbred parental lines
2. Inducing mutations
3. Harvesting seeds from the most productive plants
4. Bombarding the protoplast with DNA

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

1. Anther culture
2. Protoplast culture
3. Meristem culture
4. Embryo rescue

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

1. Pearl millet
2. Sugarcane
3. Rye
4. Barley

The world's highly prized wool yielding 'Pashmina' breed is -

1. Sheep
2. Goat-sheep cross
3. Kashmir sheep-Afghan sheep cross
4. Goat

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

1. Wheat, maize and sorghum
2. Wheat, rice and barley
3. Wheat, rice and maize
4. Rice, maize and sorghum

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

1. UV (260 nm)
2. Alpha particles
3. Gamma rays (from cobalt-60)
4. X-rays

The name of Norman Borlaug is associated with-

1. Blue Revolution
2. Yellow Revolution
3. Green Revolution
4. White Revolution

The technique of obtaining large number of plantlets by tissue culture method is called –

1. Macropropagation
2. Organ culture
3. Plantlet culture
4. Micropropagation

India's wheat yield revolution in the 1960s was possible primarily due to :-

1. Hybrid seeds
2. Quantitative trait mutations
3. Increased chlorophyll content
4. Mutations resulting in plant height reduction