MCQ
Which one is characteristic for birds
- AThey are flying animals
- BThey are warm blooded
- ✓They are Bipedal and have feathres
- DThey are quadruped and have scales
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$II. $ $Z-$ lines back to their original position
$III.$ Masking of actin filament
$IV.$ Relaxation of muscles
Arrange the above given steps in the sequence of event from first to last