第五章测试1.In the process of dedifferentiation of plant organs, tissues and cells in vitro to form callus, which of the following conditions is not necessary. ( )
A:Suitable nutrients and hormones
B:Suitable temperature
C:Sufficient light
D:disinfection
答案:C
2.Among the following four options, ( ) does not use plant tissue culture technology. ( )
A:Insect-resistant cotton plants cultivated by genetic engineering
B:Cultivation of tomato-potato hybrid plants by cell engineering
C:In vitro culture of anthers to obtain haploid plants
D:Germinated seeds or seedlings treated with colchicine to obtain polyploid plants
3.The plant hormones that induce plant tissue culture are ( ).（ ）
A:Cytokinin
B:Auxin
C:Gibberellin
D:Ethylene
4.Dedifferentiation in plant tissue culture is the process that callus grow into a large number of identical cells.（ ）
A:对 B:错 5.Dedifferentiation and redifferentiation are indispensable for formation of artificial seeds via tissue culture.（ ）
A:错 B:对
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