STD 11 - 1. The living world — NEET STD 11 Science — Question

$I.$ Cytokinins are formed primarily in roots

$II.$ Auxin and cytokinin are antagonistic in apical dominance

$III.$ Kinetin (a modified $DNA$ purine) was discovered from herring sperm

$IV.$ Zeatin is auxin

$V.$ Zeatin was firstly extracted from herring

Choose the incorrect one

$(i)$ 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

$I.$ Production of caffeine, tannin quinine

$II.$ More production of non-woody tissues

$III.$ Productions of hairs, thorns, spines

$IV.$ Production of hormone-like chemicals that interfere with insect metamorphosis

Select the correct pair