Percentage composition of fibroin and sericin in silk is
50 : 40
80 : 20
30 : 70
40 : 60
B.
80 : 20
Percentage composition of fibroin and sericin in silk is 80 : 20. Sericin is a gelatinous protein that cements the two fibroin filaments in a silk fiber.
Which one of the following poultry birds is not an english breed?
Sussex
Australorp
Orpington
Minorca
Micropropagation is a technique for production of
true to type plants
haploid plant
somatic hybrids
somaclonal plants
Root cells of wheat has 2n = 42 chromosomes. Which one of the following is the basic chromosome number of wheat?
42
21
7
14
In plant tissue culture, the callus tissues can be regenerated into complete plantlets primarily by altering the concentration of
sugars
vitamins
amino acids
hormones
By which of the following methods, new and better varieties of plants can be formed
Selection
Grafting
Hybridization
Hybridization followed by selection