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10.Biotechnology and its Application
medium
Identify the incorrect statement.
$(i)$ Bacillus thuringiensis are available in sachets as dried spores which are mixed with kerosine and sprayed on to vulnerable plants
$(ii)$ B. thuringiensis are used to control butterfly caterpillars, but leave other insects unharmed
$(iii) $ The toxin of B. thuringiensis is released in the blood of larvae and the larvae get killed
$(iv)$ By the development of methods of genetic engineering B. thuringiensis toxin genes have been introduced
A
$(i) \;and\; (ii)$
B
$(ii) \;and \;(iii)$
C
$(i)\;and\; (iii)$
D
$(ii)\; and\; (iv)$
Solution
$(i)$ Dried spores are mixed with $H_2O$
$(ii)$ Toxin of Bacillus thuringiensis is released in the gut of larvae and the larvae get killed.
Standard 12
Biology
