Which one of the following poultry birds is not an english breed?

• Sussex

• Australorp

• Orpington

• Minorca

By which of the following methods, new and better varieties of plants can be formed

• Selection

• Grafting

• Hybridization

• Hybridization followed by selection

Which one of the following is a systematic insecticide

• Malathion

• Endrin

• Parathion

• Furadan

Micropropagation is a technique for production of

• true to type plants

• haploid plant

• somatic hybrids

• somaclonal plants

The father of green revolution in India is

• Calvin

• Haberlandt

• Norman Borlaug

• Swaminathan

Pieces of plant tissue used in culture is called

• explant

• domaclone

• inoculant

• clone

Root cells of wheat has 2n = 42 chromosomes. Which one of the following is the basic chromosome number of wheat?

• 42

• 21

• 7

• 14

Percentage composition of fibroin and sericin in silk is

• 50 : 40

• 80 : 20

• 30 : 70

• 40 : 60

In honey, the percentage of maltose and other sugar is

• 9.2

• 8.81

• 10.5

• 11.2

In plant tissue culture, the callus tissues can be regenerated into complete plantlets primarily by altering the concentration of

• sugars

• vitamins

• amino acids

• hormones