MCQ
In which era mammals and birds evolved
- AMesozoic
- ✓Cenozoic
- CPalaeozoic
- DProcambrian
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$I.$ actin binding sites
$II.$ $ATP$ binding sites
$III.$ $ADP$ binding sites
$IV.$ $AMP$ binding sites
Select the correct options
| Column I | Column II |
| (a) P-wave | (i) Depolarisation of ventricles |
| (b) QRS complex | (ii) Repolarisation of ventricles |
| (c) T-wave | (iii) Coronary ischemia |
| (d) Reduction in the size of T-wave | (iv) Depolarisation of atria |
| (v) Repolarisation of atria |
Reason : Injecting the microbes intentionally during immunisation or infectious organisms gaining access into body during natural infection induces active immunity.