MCQ
‘First line of defence' is known as
- AAntibodies
- BWBC
- ✓Skin
- DLiver
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$I.$ 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