Which part would be most suitable for raising virus-free plants for micropropagation?

1.	Bark	2.	Vascular tissue
3.	Meristem	4.	Node

Consumption of which one of the following foods can prevent the kind of blindness

associated with vitamin-A deficiency ?

1. Flaver savr tomato

2. Canolla

3. Golden rice

4. Bt-brinjal

Which one of the following is a case of wrong matching ?

1. Somatic hybridisation - Fusion of two diverse cells

2. Vector DNA - Site for tRNA synthesis

3. Micropropogation - In vitro production of plants in large numbers

4. Callus - Unorganised mass of cells produced in tissue culture

'Jaya', and 'Ratna', developed for green revolution in India are the varieties of

1. rice

2. wheat 

3. bajra

4. maize

A collection of plants and seeds having diverse alleles of all the genes of a crop is called

1. germplasm

2. gene library

3. genome

4. herbarium

'Himgiri' developed by hybridisation and selection for disease resistance against rust pathogens is a variety of

1. maize

2. sugarcane

3. wheat

4. chilli

When two unrelated individuals or lines are crossed, the performance of F₁ hybrid is often

superior to both its parents. This phenomenon is called

1. transformation

2. splicing

3. metamorphosis

4. heterosis

Breeding of crops with high levels of minerals, vitamins and proteins is called

1. somatic hybridisation

2. biofortification

3. biomagnification

4. micropropogation

Somaclones are obtained by

1. tissue culture

2. plant breeding

3. irradiation

4. genetic engineering

Polyethylene glycol method is used for

1. gene transfer without a vector

2. biodiesel production

3. seedless fruit production

4. energy production from sewage