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

'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

Transgenic plants are

1. produced by a somatic embryo in artificial medium

2. generated by introducing foreign DNA in to a cell and regenerating a plant from that

cell

3. produced after protoplast fusion in artificial medium

4. grown in artificial medium after hybridisation in the field

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

1. the egg is divided into 4 pairs of cells which are implanted into the womb of other cows

2. in the eight cell stage, cells are separated and cultured until small embryos are formed

which are implanted into the womb of other cows

3. in the eight cell stage the individual cells are separated under electrical field for further

development in culture media

4. from this upto eight identical twins can be produced