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
Which one of the following is a systematic insecticide
Malathion
Endrin
Parathion
Furadan
B.
Endrin
When applied to pesticides, the termsystemic means that the chemical is soluble enough in water that it can be absorbed by a plant and moved around in its tissues.
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