MCQ
Commercially important fibres of cotton are
- AWoody fibres of roots
- BBark fibres of stem
- ✓Epidermal hairs of seeds
- DPhloem fibres of roots
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$I.$ Relaxation of the diaphragm and sternum
$II.$ Reduction of the pulmonary volume
$III.$ Expulsion of air from the lungs
$IV.$ Increase in intra pulmonary pressure
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