MCQ
The endosperm in angiosperms is formed
- ✓After fertilization
- BBefore fertilization
- CAlong with fertilization
- DBefore pollen discharge
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| Column $- I$ | Column $- II$ |
| $(I)$ Aspergillus niger | $(p)$ Lactic acid |
| $(II)$ Acetobacter aceti | $(q)$ Acetic acid |
| $(III)$ Lactobacillus | $(r)$ Citric acid |
| $(IV)$ Clostridium butylicuml | $(s)$ Butyric acid |
$I$ $II$ $III$ $IV$
$(i)$ 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