MCQ
Operculum is present in.
- AChondrichthyes
- ✓Osteichthyes
- CMammals
- DAmphibians
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| $A.$ | $\text{IAA}$ | $i.$ | Herring sperm $\text{DNA}$ |
| $B.$ | $\text{ABA}$ | $ii.$ | Bolting |
| $C.$ | Ethylene | $iii.$ | Stomatal closure |
| $D.$ | $GA$ | $iv.$ | Weed$-$free lawns |
| $E.$ | Cytokinins | $v.$ | Ripening of fruits |