By which of the following methods, new and better varieties of plants can be formed
Selection
Grafting
Hybridization
Hybridization followed by selection
Root cells of wheat has 2n = 42 chromosomes. Which one of the following is the basic chromosome number of wheat?
42
21
7
14
Micropropagation is a technique for production of
true to type plants
haploid plant
somatic hybrids
somaclonal plants
In honey, the percentage of maltose and other sugar is
9.2
8.81
10.5
11.2
B.
8.81
The greater the percentage of glucose and fructose (invert sugar), the better the quality of honey. Adulterated honey always contains less invert sugar.
Which one of the following poultry birds is not an english breed?
Sussex
Australorp
Orpington
Minorca
In plant tissue culture, the callus tissues can be regenerated into complete plantlets primarily by altering the concentration of
sugars
vitamins
amino acids
hormones