MCQ
In chondrichthyes, heart possesses.
- ATwo auricle and two ventricle
- ✓One auricle and one ventricle
- COne auricle and two ventricle
- DTwo auricle and one ventricle
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Reason $(R)$ : The recognition ability is innate.
Choose the correct option for $A$ and $B$ to complete the given statement
$I.$ Each myosin is a polymerized protein
$II.$ Many meromyosin constitutes one thick filament (myosin)
$III.$ Each meromyosin's tail is called heavy meromyosin $(HMM)$ and head is called light meromyosin $(LMM)$
$IV.$ The globular head is an active $ATP$ ase enzyme and has binding sites for $ATP$ and active sites for actin
Choose the option with correct statements